Table of Contents

Exporting Excel files to HTML (C# / netframework)

Note

This demo is available in your FlexCel installation at <FlexCel Install Folder>\samples\csharp\VS2022\netframework\25.Printing and Exporting\40.Export HTML and also at https:​//​github.​com/​tmssoftware/​TMS-​FlexCel.​NET-​demos/​tree/​master/​csharp/​VS2022/​netframework/​Modules/​25.​Printing and Exporting/40.Export HTML

Overview

FlexCel can natively export an Excel file to HTML, in many formats like XHTML 1.1, HTML 3.2, HTML 4.1 strict or HTML 5.

Concepts

  • HTML is a format that makes emphasis in semantics over presentation, and because of this reason the HTML file will not be as faithful to the original file as a PDF. PDF are targeted especially for handling presentation. Anyway, the output is very similar and in many ways better (and more cross-browser) than the HTML generated by Excel itself when saving to HTML.

  • Among the things that are not exported you can find:

  • ActiveX objects

  • 3D Charts (They will be rendered as 2d)

  • Not common AutoShapes (most used Autoshapes, as rectangles, rounded rectangles, ellipses, etc are exported)

Files

AssemblyInfo.cs

using System.Reflection;
using System.Runtime.CompilerServices;

//
// General Information about an assembly is controlled through the following 
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
//
[assembly: AssemblyTitle("")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("")]
[assembly: AssemblyCopyright("(c) 2002 - 2025 TMS Software")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]

//
// Version information for an assembly consists of the following four values:
//
//      Major Version
//      Minor Version 
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Revision and Build Numbers 
// by using the '*' as shown below:

[assembly: AssemblyVersion("7.25.0.0")]

//
// In order to sign your assembly you must specify a key to use. Refer to the 
// Microsoft .NET Framework documentation for more information on assembly signing.
//
// Use the attributes below to control which key is used for signing. 
//
// Notes: 
//   (*) If no key is specified, the assembly is not signed.
//   (*) KeyName refers to a key that has been installed in the Crypto Service
//       Provider (CSP) on your machine. KeyFile refers to a file which contains
//       a key.
//   (*) If the KeyFile and the KeyName values are both specified, the 
//       following processing occurs:
//       (1) If the KeyName can be found in the CSP, that key is used.
//       (2) If the KeyName does not exist and the KeyFile does exist, the key 
//           in the KeyFile is installed into the CSP and used.
//   (*) In order to create a KeyFile, you can use the sn.exe (Strong Name) utility.
//       When specifying the KeyFile, the location of the KeyFile should be
//       relative to the project output directory which is
//       %Project Directory%\obj\<configuration>. For example, if your KeyFile is
//       located in the project directory, you would specify the AssemblyKeyFile 
//       attribute as [assembly: AssemblyKeyFile("..\\..\\mykey.snk")]
//   (*) Delay Signing is an advanced option - see the Microsoft .NET Framework
//       documentation for more information on this.
//
[assembly: AssemblyDelaySign(false)]
[assembly: AssemblyKeyFile("")]
[assembly: AssemblyKeyName("")]

Form1.cs

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using FlexCel.Core;
using FlexCel.XlsAdapter;
using FlexCel.Render;
using System.IO;
using System.Diagnostics;

using System.Text;



namespace ExportHTML
{
    /// <summary>
    /// An Example on how to export to HTML.
    /// </summary>
    public partial class mainForm: System.Windows.Forms.Form
    {
        private FlexCel.Render.FlexCelHtmlExport flexCelHtmlExport1;


        public mainForm()
        {
            InitializeComponent();
        }

        private Mailform MailDialog;

        private void button2_Click(object sender, System.EventArgs e)
        {
            Close();
        }

        private void LoadSheetConfig()
        {
            ExcelFile Xls = flexCelHtmlExport1.Workbook;

            chGridLines.Checked = Xls.PrintGridLines;
            chPrintHeadings.Checked = Xls.PrintHeadings;
            chFormulaText.Checked = Xls.ShowFormulaText;
        }

        private void openFile_Click(object sender, System.EventArgs e)
        {
            if (openFileDialog1.ShowDialog() != DialogResult.OK) return;
            flexCelHtmlExport1.Workbook = new XlsFile();

            flexCelHtmlExport1.Workbook.Open(openFileDialog1.FileName);

            Text = "Export: " + openFileDialog1.FileName;

            ExcelFile Xls = flexCelHtmlExport1.Workbook;

            cbSheet.Items.Clear();
            for (int i = 1; i <= Xls.SheetCount; i++)
            {
                cbSheet.Items.Add(Xls.GetSheetName(i));
            }
            cbSheet.SelectedIndex = Xls.ActiveSheet - 1;

            LoadSheetConfig();
        }

        private bool HasFileOpen()
        {
            if (flexCelHtmlExport1.Workbook == null)
            {
                MessageBox.Show("You need to open a file first.");
                return false;
            }
            return true;
        }

        private bool LoadPreferences()
        {
            //NOTE: THERE SHOULD BE *A LOT* MORE VALIDATION OF VALUES ON THIS METHOD. (For example, validate that margins are between bounds)
            // As this is a simple demo, they are not included. 
            try
            {
                ExcelFile Xls = flexCelHtmlExport1.Workbook;

                //Note: In this demo we will only apply this things to the active sheet.
                //If you want to apply the settings to all the sheets, you should loop in the sheets and change them here.
                Xls.PrintGridLines = chGridLines.Checked;
                Xls.PrintHeadings = chPrintHeadings.Checked;
                Xls.ShowFormulaText = chFormulaText.Checked;

                flexCelHtmlExport1.PrintRangeLeft = Convert.ToInt32(edLeft.Text);
                flexCelHtmlExport1.PrintRangeTop = Convert.ToInt32(edTop.Text);
                flexCelHtmlExport1.PrintRangeRight = Convert.ToInt32(edRight.Text);
                flexCelHtmlExport1.PrintRangeBottom = Convert.ToInt32(edBottom.Text);

                if (sbSVG.Checked) flexCelHtmlExport1.SavedImagesFormat = THtmlImageFormat.Svg; else flexCelHtmlExport1.SavedImagesFormat = THtmlImageFormat.Png;
                flexCelHtmlExport1.EmbedImages = cbEmbedImages.Checked;

                flexCelHtmlExport1.FixOutlook2007CssSupport = cbOutlook2007.Checked;
                flexCelHtmlExport1.FixIE6TransparentPngSupport = cbIe6Png.Checked;

                flexCelHtmlExport1.HidePrintObjects = THidePrintObjects.None;
                if (!cbImages.Checked) flexCelHtmlExport1.HidePrintObjects |= THidePrintObjects.Images;
                if (!cbHyperlinks.Checked) flexCelHtmlExport1.HidePrintObjects |= THidePrintObjects.Hyperlynks;
                if (!cbComments.Checked) flexCelHtmlExport1.HidePrintObjects |= THidePrintObjects.Comments;
                if (!cbHeadersFooters.Checked) flexCelHtmlExport1.HidePrintObjects |= THidePrintObjects.HeadersAndFooters;

            }
            catch (Exception e)
            {
                MessageBox.Show("Error: " + e.Message);
                return false;
            }
            return true;
        }


        private void cbSheet_SelectedIndexChanged(object sender, System.EventArgs e)
        {
            flexCelHtmlExport1.Workbook.ActiveSheet = cbSheet.SelectedIndex + 1;
            LoadSheetConfig();
        }

        private void export_Click(object sender, System.EventArgs e)
        {
            if (!HasFileOpen()) return;
            if (!LoadPreferences()) return;

            if (cbFileFormat.SelectedIndex == 1)
            {
                flexCelHtmlExport1.HtmlFileFormat = THtmlFileFormat.MHtml;
                exportDialog.FilterIndex = 2;
            }
            else
            {
                flexCelHtmlExport1.HtmlFileFormat = THtmlFileFormat.Html;
                exportDialog.FilterIndex = 1;
            }

            if (exportDialog.ShowDialog() != DialogResult.OK) return;

            flexCelHtmlExport1.AllowOverwritingFiles = true;

            string CssFileName = null;
            if (cbCss.Checked) CssFileName = edCss.Text;

            string FileNameToOpen = exportDialog.FileName;

            switch (cbHtmlVersion.SelectedIndex)
            {
                case 0: flexCelHtmlExport1.HtmlVersion = THtmlVersion.Html_32; break;
                case 2: flexCelHtmlExport1.HtmlVersion = THtmlVersion.XHTML_10; break;
                case 3: flexCelHtmlExport1.HtmlVersion = THtmlVersion.Html_5; break;
                default:
                    flexCelHtmlExport1.HtmlVersion = THtmlVersion.Html_401;
                    break;
            }

            if (edBodyStart.Text != null) flexCelHtmlExport1.ExtraInfo.BodyStart = new string[] { edBodyStart.Text };

            switch (cbExportObject.SelectedIndex)
            {
                case 0:
                    TSheetSelectorPosition SelectorPosition = TSheetSelectorPosition.None;

                    //If in VB.NET or Delphi.NET, use "if cbTop.Checked then SelectorPosition = SelectorPosition or TSheetSelectorPosition.Top"
                    if (cbTop.Checked) SelectorPosition |= TSheetSelectorPosition.Top;
                    if (cbLeft.Checked) SelectorPosition |= TSheetSelectorPosition.Left;
                    if (cbBottom.Checked) SelectorPosition |= TSheetSelectorPosition.Bottom;
                    if (cbRight.Checked) SelectorPosition |= TSheetSelectorPosition.Right;


                    flexCelHtmlExport1.ExportAllVisibleSheetsAsTabs(Path.GetDirectoryName(exportDialog.FileName),
                        Path.GetFileNameWithoutExtension(exportDialog.FileName), Path.GetExtension(exportDialog.FileName), edImages.Text, CssFileName, new TStandardSheetSelector(SelectorPosition));

                    FileNameToOpen = Path.Combine(Path.GetDirectoryName(exportDialog.FileName), Path.GetFileNameWithoutExtension(exportDialog.FileName));
                    FileNameToOpen = Path.Combine(FileNameToOpen, flexCelHtmlExport1.Workbook.SheetName);
                    FileNameToOpen = Path.Combine(FileNameToOpen, Path.GetExtension(exportDialog.FileName));

                    break;
                case 1:
                    flexCelHtmlExport1.ExportAllVisibleSheetsAsOneHtmlFile(exportDialog.FileName, edImages.Text, CssFileName, edSheetSeparator.Text);
                    break;

                case 2:
                    {
                        flexCelHtmlExport1.Export(exportDialog.FileName, edImages.Text, CssFileName);
                        break;
                    }
            }

            string[] GeneratedFiles = flexCelHtmlExport1.GeneratedFiles.GetHtmlFiles();
            if (GeneratedFiles.Length == 0)
            {
                MessageBox.Show("Error: No file has been generated");
            }
            else
            {
                if (MessageBox.Show("Do you want to open the generated file?", "Confirm", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    Process.Start(GeneratedFiles[0]);
                }
            }
        }

        private void btnEmail_Click(object sender, System.EventArgs e)
        {
            if (!HasFileOpen()) return;
            if (MailDialog == null) MailDialog = new Mailform();
            MailDialog.MainForm = this;

            if (!flexCelHtmlExport1.FixOutlook2007CssSupport)
            {
                DialogResult dr = MessageBox.Show("You have not checked \"Outlook 2007 support\". If any of your clients has Outlook express, you should turn this on.\n\nUse Outlook 2007 fix?", "Warning", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);

                if (dr == DialogResult.Cancel) return;
                if (dr == DialogResult.Yes)
                {
                    cbOutlook2007.Checked = true;
                    flexCelHtmlExport1.FixOutlook2007CssSupport = true;
                }
            }

            MailDialog.ShowDialog();

        }

        public byte[] GenerateMHTML()
        {
            LoadPreferences();
            flexCelHtmlExport1.HtmlFileFormat = THtmlFileFormat.MHtml;


            flexCelHtmlExport1.AllowOverwritingFiles = true;

            flexCelHtmlExport1.HtmlVersion = THtmlVersion.Html_401;

            if (edBodyStart.Text != null) flexCelHtmlExport1.ExtraInfo.BodyStart = new string[] { edBodyStart.Text };

            using (MemoryStream ms = new MemoryStream())
            {
                using (StreamWriter writer = new StreamWriter(ms, Encoding.UTF8))
                {
                    flexCelHtmlExport1.Export(writer, flexCelHtmlExport1.Workbook.ActiveFileName, null);
                }
                return ms.ToArray();
            }
        }


        private void mainForm_Load(object sender, System.EventArgs e)
        {
            cbExportObject.SelectedIndex = 0;
            cbHtmlVersion.SelectedIndex = 3;
            cbFileFormat.SelectedIndex = 0;
        }

        private void cbExportObject_SelectedIndexChanged(object sender, System.EventArgs e)
        {
            edSheetSeparator.Enabled = cbExportObject.SelectedIndex == 1;
            cbTop.Enabled = cbExportObject.SelectedIndex == 0;
            cbLeft.Enabled = cbExportObject.SelectedIndex == 0;
            cbRight.Enabled = cbExportObject.SelectedIndex == 0;
            cbBottom.Enabled = cbExportObject.SelectedIndex == 0;
            cbSheet.Enabled = cbExportObject.SelectedIndex == 2;
        }

        private void cbCss_CheckedChanged(object sender, System.EventArgs e)
        {
            edCss.Enabled = cbCss.Checked;
        }

        private void flexCelHtmlExport1_HtmlFont(object sender, FlexCel.Core.HtmlFontEventArgs e)
        {
            if (cbReplaceFonts.Checked)
            {
                e.FontFamily = "arial, sans-serif";
            }
        }

    }
}

Form1.Designer.cs

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using FlexCel.Core;
using FlexCel.XlsAdapter;
using FlexCel.Render;
using System.IO;
using System.Diagnostics;
using System.Text;
namespace ExportHTML
{
    public partial class mainForm: System.Windows.Forms.Form
    {
        private System.Windows.Forms.OpenFileDialog openFileDialog1;
        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Panel panel3;
        private System.Windows.Forms.Label label12;
        private System.Windows.Forms.Label label13;
        private System.Windows.Forms.Label label14;
        private System.Windows.Forms.TextBox edTop;
        private System.Windows.Forms.TextBox edLeft;
        private System.Windows.Forms.Label label15;
        private System.Windows.Forms.TextBox edRight;
        private System.Windows.Forms.Label label16;
        private System.Windows.Forms.TextBox edBottom;
        private System.Windows.Forms.Label label17;
        private System.Windows.Forms.SaveFileDialog exportDialog;
        private System.Windows.Forms.Panel panel8;
        private System.Windows.Forms.CheckBox chFormulaText;
        private System.Windows.Forms.CheckBox chGridLines;
        private System.Windows.Forms.Label label24;
        private System.Windows.Forms.Panel panel4;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.CheckBox cbOutlook2007;
        private System.Windows.Forms.Panel panel5;
        private System.Windows.Forms.Label label5;
        private System.Windows.Forms.Panel panel6;
        private System.Windows.Forms.Label label6;
        private System.Windows.Forms.CheckBox checkBox4;
        private System.Windows.Forms.CheckBox cbIe6Png;
        private System.Windows.Forms.CheckBox cbComments;
        private System.Windows.Forms.CheckBox cbHyperlinks;
        private System.Windows.Forms.CheckBox cbImages;
        private System.Windows.Forms.Panel panel7;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.ComboBox cbExportObject;
        private System.Windows.Forms.Label lblSheetToExport;
        private System.Windows.Forms.ComboBox cbSheet;
        private System.Windows.Forms.Panel panel9;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.CheckBox cbTop;
        private System.Windows.Forms.CheckBox cbLeft;
        private System.Windows.Forms.CheckBox cbRight;
        private System.Windows.Forms.CheckBox cbBottom;
        private System.Windows.Forms.Panel panel10;
        private System.Windows.Forms.Label label7;
        private System.Windows.Forms.TextBox edSheetSeparator;
        private System.Windows.Forms.Panel panel11;
        private System.Windows.Forms.Label label8;
        private System.Windows.Forms.Panel panel12;
        private System.Windows.Forms.CheckBox cbCss;
        private System.Windows.Forms.TextBox edCss;
        private System.Windows.Forms.TextBox edImages;
        private System.Windows.Forms.ComboBox cbHtmlVersion;
        private System.Windows.Forms.ComboBox cbFileFormat;
        private System.Windows.Forms.Label label9;
        private System.Windows.Forms.Panel panel13;
        private System.Windows.Forms.TextBox edBodyStart;
        private System.Windows.Forms.Label label10;
        private System.Windows.Forms.CheckBox cbReplaceFonts;
        private System.Windows.Forms.CheckBox chPrintHeadings;
        private System.Windows.Forms.CheckBox cbHeadersFooters;
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(mainForm));
            this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
            this.panel1 = new System.Windows.Forms.Panel();
            this.cbReplaceFonts = new System.Windows.Forms.CheckBox();
            this.panel13 = new System.Windows.Forms.Panel();
            this.edBodyStart = new System.Windows.Forms.TextBox();
            this.label10 = new System.Windows.Forms.Label();
            this.panel12 = new System.Windows.Forms.Panel();
            this.cbCss = new System.Windows.Forms.CheckBox();
            this.edCss = new System.Windows.Forms.TextBox();
            this.panel11 = new System.Windows.Forms.Panel();
            this.edImages = new System.Windows.Forms.TextBox();
            this.label8 = new System.Windows.Forms.Label();
            this.panel10 = new System.Windows.Forms.Panel();
            this.edSheetSeparator = new System.Windows.Forms.TextBox();
            this.label7 = new System.Windows.Forms.Label();
            this.panel9 = new System.Windows.Forms.Panel();
            this.cbBottom = new System.Windows.Forms.CheckBox();
            this.cbRight = new System.Windows.Forms.CheckBox();
            this.cbLeft = new System.Windows.Forms.CheckBox();
            this.cbTop = new System.Windows.Forms.CheckBox();
            this.label3 = new System.Windows.Forms.Label();
            this.panel7 = new System.Windows.Forms.Panel();
            this.cbExportObject = new System.Windows.Forms.ComboBox();
            this.lblSheetToExport = new System.Windows.Forms.Label();
            this.cbSheet = new System.Windows.Forms.ComboBox();
            this.label2 = new System.Windows.Forms.Label();
            this.panel6 = new System.Windows.Forms.Panel();
            this.cbHeadersFooters = new System.Windows.Forms.CheckBox();
            this.cbImages = new System.Windows.Forms.CheckBox();
            this.cbHyperlinks = new System.Windows.Forms.CheckBox();
            this.cbComments = new System.Windows.Forms.CheckBox();
            this.label6 = new System.Windows.Forms.Label();
            this.panel5 = new System.Windows.Forms.Panel();
            this.cbIe6Png = new System.Windows.Forms.CheckBox();
            this.label5 = new System.Windows.Forms.Label();
            this.cbOutlook2007 = new System.Windows.Forms.CheckBox();
            this.panel4 = new System.Windows.Forms.Panel();
            this.cbEmbedImages = new System.Windows.Forms.CheckBox();
            this.sbSVG = new System.Windows.Forms.CheckBox();
            this.label9 = new System.Windows.Forms.Label();
            this.cbFileFormat = new System.Windows.Forms.ComboBox();
            this.cbHtmlVersion = new System.Windows.Forms.ComboBox();
            this.label4 = new System.Windows.Forms.Label();
            this.panel3 = new System.Windows.Forms.Panel();
            this.edBottom = new System.Windows.Forms.TextBox();
            this.label17 = new System.Windows.Forms.Label();
            this.edRight = new System.Windows.Forms.TextBox();
            this.label16 = new System.Windows.Forms.Label();
            this.edLeft = new System.Windows.Forms.TextBox();
            this.label15 = new System.Windows.Forms.Label();
            this.edTop = new System.Windows.Forms.TextBox();
            this.label14 = new System.Windows.Forms.Label();
            this.label13 = new System.Windows.Forms.Label();
            this.label12 = new System.Windows.Forms.Label();
            this.label1 = new System.Windows.Forms.Label();
            this.panel8 = new System.Windows.Forms.Panel();
            this.chPrintHeadings = new System.Windows.Forms.CheckBox();
            this.label24 = new System.Windows.Forms.Label();
            this.chFormulaText = new System.Windows.Forms.CheckBox();
            this.chGridLines = new System.Windows.Forms.CheckBox();
            this.checkBox4 = new System.Windows.Forms.CheckBox();
            this.exportDialog = new System.Windows.Forms.SaveFileDialog();
            this.flexCelHtmlExport1 = new FlexCel.Render.FlexCelHtmlExport();
            this.mainToolbar = new System.Windows.Forms.ToolStrip();
            this.openFile = new System.Windows.Forms.ToolStripButton();
            this.export = new System.Windows.Forms.ToolStripButton();
            this.btnEmail = new System.Windows.Forms.ToolStripButton();
            this.toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator();
            this.btnClose = new System.Windows.Forms.ToolStripButton();
            this.panel1.SuspendLayout();
            this.panel13.SuspendLayout();
            this.panel12.SuspendLayout();
            this.panel11.SuspendLayout();
            this.panel10.SuspendLayout();
            this.panel9.SuspendLayout();
            this.panel7.SuspendLayout();
            this.panel6.SuspendLayout();
            this.panel5.SuspendLayout();
            this.panel4.SuspendLayout();
            this.panel3.SuspendLayout();
            this.panel8.SuspendLayout();
            this.mainToolbar.SuspendLayout();
            this.SuspendLayout();
            // 
            // openFileDialog1
            // 
            this.openFileDialog1.DefaultExt = "xls";
            this.openFileDialog1.Filter = "Excel Files|*.xls;*.xlsx;*.xlsm|Excel 97/2003|*.xls|Excel 2007|*.xlsx;*.xlsm|All " +
    "files|*.*";
            this.openFileDialog1.Title = "Open an Excel File";
            // 
            // panel1
            // 
            this.panel1.BackColor = System.Drawing.Color.White;
            this.panel1.Controls.Add(this.cbReplaceFonts);
            this.panel1.Controls.Add(this.panel13);
            this.panel1.Controls.Add(this.panel12);
            this.panel1.Controls.Add(this.panel11);
            this.panel1.Controls.Add(this.panel10);
            this.panel1.Controls.Add(this.panel9);
            this.panel1.Controls.Add(this.panel7);
            this.panel1.Controls.Add(this.panel6);
            this.panel1.Controls.Add(this.panel5);
            this.panel1.Controls.Add(this.panel4);
            this.panel1.Controls.Add(this.panel3);
            this.panel1.Controls.Add(this.label1);
            this.panel1.Controls.Add(this.panel8);
            this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.panel1.Location = new System.Drawing.Point(0, 0);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(768, 696);
            this.panel1.TabIndex = 3;
            // 
            // cbReplaceFonts
            // 
            this.cbReplaceFonts.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.cbReplaceFonts.Location = new System.Drawing.Point(40, 634);
            this.cbReplaceFonts.Name = "cbReplaceFonts";
            this.cbReplaceFonts.Size = new System.Drawing.Size(632, 24);
            this.cbReplaceFonts.TabIndex = 50;
            this.cbReplaceFonts.Text = "Replace all fonts with Arial";
            // 
            // panel13
            // 
            this.panel13.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.panel13.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel13.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel13.Controls.Add(this.edBodyStart);
            this.panel13.Controls.Add(this.label10);
            this.panel13.Location = new System.Drawing.Point(32, 562);
            this.panel13.Name = "panel13";
            this.panel13.Size = new System.Drawing.Size(704, 64);
            this.panel13.TabIndex = 49;
            // 
            // edBodyStart
            // 
            this.edBodyStart.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.edBodyStart.Location = new System.Drawing.Point(16, 32);
            this.edBodyStart.Name = "edBodyStart";
            this.edBodyStart.Size = new System.Drawing.Size(664, 20);
            this.edBodyStart.TabIndex = 20;
            this.edBodyStart.Text = "<h1>Created with FlexCel</h1>";
            // 
            // label10
            // 
            this.label10.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label10.Location = new System.Drawing.Point(8, 8);
            this.label10.Name = "label10";
            this.label10.Size = new System.Drawing.Size(584, 16);
            this.label10.TabIndex = 19;
            this.label10.Text = "Text to add at the beginning of the file:";
            // 
            // panel12
            // 
            this.panel12.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.panel12.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel12.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel12.Controls.Add(this.cbCss);
            this.panel12.Controls.Add(this.edCss);
            this.panel12.Location = new System.Drawing.Point(32, 490);
            this.panel12.Name = "panel12";
            this.panel12.Size = new System.Drawing.Size(704, 64);
            this.panel12.TabIndex = 48;
            // 
            // cbCss
            // 
            this.cbCss.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.cbCss.Location = new System.Drawing.Point(16, 8);
            this.cbCss.Name = "cbCss";
            this.cbCss.Size = new System.Drawing.Size(632, 24);
            this.cbCss.TabIndex = 21;
            this.cbCss.Text = "Save CSS to an external file (path relative to where the html file is)";
            this.cbCss.CheckedChanged += new System.EventHandler(this.cbCss_CheckedChanged);
            // 
            // edCss
            // 
            this.edCss.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.edCss.Enabled = false;
            this.edCss.Location = new System.Drawing.Point(16, 32);
            this.edCss.Name = "edCss";
            this.edCss.Size = new System.Drawing.Size(664, 20);
            this.edCss.TabIndex = 20;
            this.edCss.Text = "css\\test.css";
            // 
            // panel11
            // 
            this.panel11.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.panel11.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel11.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel11.Controls.Add(this.edImages);
            this.panel11.Controls.Add(this.label8);
            this.panel11.Location = new System.Drawing.Point(32, 418);
            this.panel11.Name = "panel11";
            this.panel11.Size = new System.Drawing.Size(704, 64);
            this.panel11.TabIndex = 47;
            // 
            // edImages
            // 
            this.edImages.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.edImages.Location = new System.Drawing.Point(16, 32);
            this.edImages.Name = "edImages";
            this.edImages.Size = new System.Drawing.Size(664, 20);
            this.edImages.TabIndex = 20;
            this.edImages.Text = "images";
            // 
            // label8
            // 
            this.label8.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label8.Location = new System.Drawing.Point(8, 8);
            this.label8.Name = "label8";
            this.label8.Size = new System.Drawing.Size(584, 16);
            this.label8.TabIndex = 19;
            this.label8.Text = "Relative path for images (make it empty to save the images in the same folder as " +
    "the html file)";
            // 
            // panel10
            // 
            this.panel10.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.panel10.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel10.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel10.Controls.Add(this.edSheetSeparator);
            this.panel10.Controls.Add(this.label7);
            this.panel10.Location = new System.Drawing.Point(224, 338);
            this.panel10.Name = "panel10";
            this.panel10.Size = new System.Drawing.Size(512, 72);
            this.panel10.TabIndex = 46;
            // 
            // edSheetSeparator
            // 
            this.edSheetSeparator.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.edSheetSeparator.Location = new System.Drawing.Point(16, 32);
            this.edSheetSeparator.Name = "edSheetSeparator";
            this.edSheetSeparator.Size = new System.Drawing.Size(472, 20);
            this.edSheetSeparator.TabIndex = 20;
            this.edSheetSeparator.Text = "<p><hr />Sheet <#SheetName>  (<#SheetPos> of <#SheetCount>)";
            // 
            // label7
            // 
            this.label7.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label7.Location = new System.Drawing.Point(8, 8);
            this.label7.Name = "label7";
            this.label7.Size = new System.Drawing.Size(480, 16);
            this.label7.TabIndex = 19;
            this.label7.Text = "Sheet separator (When exporting all sheets in one file)";
            // 
            // panel9
            // 
            this.panel9.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel9.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel9.Controls.Add(this.cbBottom);
            this.panel9.Controls.Add(this.cbRight);
            this.panel9.Controls.Add(this.cbLeft);
            this.panel9.Controls.Add(this.cbTop);
            this.panel9.Controls.Add(this.label3);
            this.panel9.Location = new System.Drawing.Point(224, 266);
            this.panel9.Name = "panel9";
            this.panel9.Size = new System.Drawing.Size(288, 64);
            this.panel9.TabIndex = 45;
            // 
            // cbBottom
            // 
            this.cbBottom.Location = new System.Drawing.Point(216, 32);
            this.cbBottom.Name = "cbBottom";
            this.cbBottom.Size = new System.Drawing.Size(64, 16);
            this.cbBottom.TabIndex = 23;
            this.cbBottom.Text = "Bottom";
            // 
            // cbRight
            // 
            this.cbRight.Location = new System.Drawing.Point(144, 32);
            this.cbRight.Name = "cbRight";
            this.cbRight.Size = new System.Drawing.Size(64, 16);
            this.cbRight.TabIndex = 22;
            this.cbRight.Text = "Right";
            // 
            // cbLeft
            // 
            this.cbLeft.Location = new System.Drawing.Point(24, 32);
            this.cbLeft.Name = "cbLeft";
            this.cbLeft.Size = new System.Drawing.Size(48, 16);
            this.cbLeft.TabIndex = 21;
            this.cbLeft.Text = "Left";
            // 
            // cbTop
            // 
            this.cbTop.Checked = true;
            this.cbTop.CheckState = System.Windows.Forms.CheckState.Checked;
            this.cbTop.Location = new System.Drawing.Point(88, 32);
            this.cbTop.Name = "cbTop";
            this.cbTop.Size = new System.Drawing.Size(48, 16);
            this.cbTop.TabIndex = 20;
            this.cbTop.Text = "Top";
            // 
            // label3
            // 
            this.label3.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label3.Location = new System.Drawing.Point(8, 8);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(192, 16);
            this.label3.TabIndex = 19;
            this.label3.Text = "Tabs:";
            // 
            // panel7
            // 
            this.panel7.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.panel7.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel7.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel7.Controls.Add(this.cbExportObject);
            this.panel7.Controls.Add(this.lblSheetToExport);
            this.panel7.Controls.Add(this.cbSheet);
            this.panel7.Controls.Add(this.label2);
            this.panel7.Location = new System.Drawing.Point(32, 52);
            this.panel7.Name = "panel7";
            this.panel7.Size = new System.Drawing.Size(704, 72);
            this.panel7.TabIndex = 44;
            // 
            // cbExportObject
            // 
            this.cbExportObject.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.cbExportObject.Items.AddRange(new object[] {
            "All sheets as Tabs",
            "All sheets as a single file",
            "Active Sheet:"});
            this.cbExportObject.Location = new System.Drawing.Point(8, 32);
            this.cbExportObject.Name = "cbExportObject";
            this.cbExportObject.Size = new System.Drawing.Size(248, 21);
            this.cbExportObject.TabIndex = 46;
            this.cbExportObject.SelectedIndexChanged += new System.EventHandler(this.cbExportObject_SelectedIndexChanged);
            // 
            // lblSheetToExport
            // 
            this.lblSheetToExport.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.lblSheetToExport.Location = new System.Drawing.Point(304, 8);
            this.lblSheetToExport.Name = "lblSheetToExport";
            this.lblSheetToExport.Size = new System.Drawing.Size(96, 16);
            this.lblSheetToExport.TabIndex = 45;
            this.lblSheetToExport.Text = "Sheet to export:";
            // 
            // cbSheet
            // 
            this.cbSheet.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.cbSheet.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.cbSheet.Location = new System.Drawing.Point(304, 32);
            this.cbSheet.Name = "cbSheet";
            this.cbSheet.Size = new System.Drawing.Size(360, 21);
            this.cbSheet.TabIndex = 44;
            // 
            // label2
            // 
            this.label2.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label2.Location = new System.Drawing.Point(8, 8);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(192, 16);
            this.label2.TabIndex = 19;
            this.label2.Text = "What to Export:";
            // 
            // panel6
            // 
            this.panel6.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel6.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel6.Controls.Add(this.cbHeadersFooters);
            this.panel6.Controls.Add(this.cbImages);
            this.panel6.Controls.Add(this.cbHyperlinks);
            this.panel6.Controls.Add(this.cbComments);
            this.panel6.Controls.Add(this.label6);
            this.panel6.Location = new System.Drawing.Point(32, 226);
            this.panel6.Name = "panel6";
            this.panel6.Size = new System.Drawing.Size(176, 104);
            this.panel6.TabIndex = 42;
            // 
            // cbHeadersFooters
            // 
            this.cbHeadersFooters.Location = new System.Drawing.Point(96, 40);
            this.cbHeadersFooters.Name = "cbHeadersFooters";
            this.cbHeadersFooters.Size = new System.Drawing.Size(72, 44);
            this.cbHeadersFooters.TabIndex = 23;
            this.cbHeadersFooters.Text = "Headers / Footers";
            // 
            // cbImages
            // 
            this.cbImages.Checked = true;
            this.cbImages.CheckState = System.Windows.Forms.CheckState.Checked;
            this.cbImages.Location = new System.Drawing.Point(16, 32);
            this.cbImages.Name = "cbImages";
            this.cbImages.Size = new System.Drawing.Size(72, 24);
            this.cbImages.TabIndex = 22;
            this.cbImages.Text = "Images";
            // 
            // cbHyperlinks
            // 
            this.cbHyperlinks.Checked = true;
            this.cbHyperlinks.CheckState = System.Windows.Forms.CheckState.Checked;
            this.cbHyperlinks.Location = new System.Drawing.Point(16, 80);
            this.cbHyperlinks.Name = "cbHyperlinks";
            this.cbHyperlinks.Size = new System.Drawing.Size(80, 24);
            this.cbHyperlinks.TabIndex = 21;
            this.cbHyperlinks.Text = "HyperLinks";
            // 
            // cbComments
            // 
            this.cbComments.Checked = true;
            this.cbComments.CheckState = System.Windows.Forms.CheckState.Checked;
            this.cbComments.Location = new System.Drawing.Point(16, 56);
            this.cbComments.Name = "cbComments";
            this.cbComments.Size = new System.Drawing.Size(80, 24);
            this.cbComments.TabIndex = 20;
            this.cbComments.Text = "Comments";
            // 
            // label6
            // 
            this.label6.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label6.Location = new System.Drawing.Point(8, 16);
            this.label6.Name = "label6";
            this.label6.Size = new System.Drawing.Size(192, 16);
            this.label6.TabIndex = 19;
            this.label6.Text = "Objects to Export:";
            // 
            // panel5
            // 
            this.panel5.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel5.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel5.Controls.Add(this.cbIe6Png);
            this.panel5.Controls.Add(this.label5);
            this.panel5.Controls.Add(this.cbOutlook2007);
            this.panel5.Location = new System.Drawing.Point(32, 338);
            this.panel5.Name = "panel5";
            this.panel5.Size = new System.Drawing.Size(176, 72);
            this.panel5.TabIndex = 41;
            // 
            // cbIe6Png
            // 
            this.cbIe6Png.Location = new System.Drawing.Point(16, 40);
            this.cbIe6Png.Name = "cbIe6Png";
            this.cbIe6Png.Size = new System.Drawing.Size(153, 24);
            this.cbIe6Png.TabIndex = 20;
            this.cbIe6Png.Text = "Fix for IE6 support";
            // 
            // label5
            // 
            this.label5.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label5.Location = new System.Drawing.Point(8, 8);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(192, 16);
            this.label5.TabIndex = 19;
            this.label5.Text = "Browser Fixes";
            // 
            // cbOutlook2007
            // 
            this.cbOutlook2007.Location = new System.Drawing.Point(16, 24);
            this.cbOutlook2007.Name = "cbOutlook2007";
            this.cbOutlook2007.Size = new System.Drawing.Size(128, 16);
            this.cbOutlook2007.TabIndex = 16;
            this.cbOutlook2007.Text = "Fix for Outlook2007";
            // 
            // panel4
            // 
            this.panel4.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel4.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel4.Controls.Add(this.cbEmbedImages);
            this.panel4.Controls.Add(this.sbSVG);
            this.panel4.Controls.Add(this.label9);
            this.panel4.Controls.Add(this.cbFileFormat);
            this.panel4.Controls.Add(this.cbHtmlVersion);
            this.panel4.Controls.Add(this.label4);
            this.panel4.Location = new System.Drawing.Point(224, 130);
            this.panel4.Name = "panel4";
            this.panel4.Size = new System.Drawing.Size(288, 128);
            this.panel4.TabIndex = 40;
            // 
            // cbEmbedImages
            // 
            this.cbEmbedImages.Location = new System.Drawing.Point(8, 91);
            this.cbEmbedImages.Name = "cbEmbedImages";
            this.cbEmbedImages.Size = new System.Drawing.Size(128, 28);
            this.cbEmbedImages.TabIndex = 51;
            this.cbEmbedImages.Text = "Embed images";
            // 
            // sbSVG
            // 
            this.sbSVG.Location = new System.Drawing.Point(141, 91);
            this.sbSVG.Name = "sbSVG";
            this.sbSVG.Size = new System.Drawing.Size(139, 28);
            this.sbSVG.TabIndex = 50;
            this.sbSVG.Text = "Export images as SVG";
            // 
            // label9
            // 
            this.label9.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label9.Location = new System.Drawing.Point(8, 8);
            this.label9.Name = "label9";
            this.label9.Size = new System.Drawing.Size(192, 16);
            this.label9.TabIndex = 49;
            this.label9.Text = "HTML Version";
            // 
            // cbFileFormat
            // 
            this.cbFileFormat.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.cbFileFormat.Items.AddRange(new object[] {
            "HTML",
            "MHTML"});
            this.cbFileFormat.Location = new System.Drawing.Point(8, 64);
            this.cbFileFormat.Name = "cbFileFormat";
            this.cbFileFormat.Size = new System.Drawing.Size(272, 21);
            this.cbFileFormat.TabIndex = 48;
            // 
            // cbHtmlVersion
            // 
            this.cbHtmlVersion.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.cbHtmlVersion.Items.AddRange(new object[] {
            "HTML 3.2",
            "HTML 4.01",
            "XHTML 1.1",
            "HTML 5"});
            this.cbHtmlVersion.Location = new System.Drawing.Point(8, 24);
            this.cbHtmlVersion.Name = "cbHtmlVersion";
            this.cbHtmlVersion.Size = new System.Drawing.Size(272, 21);
            this.cbHtmlVersion.TabIndex = 47;
            // 
            // label4
            // 
            this.label4.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label4.Location = new System.Drawing.Point(5, 48);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(192, 16);
            this.label4.TabIndex = 19;
            this.label4.Text = "File Format:";
            // 
            // panel3
            // 
            this.panel3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
            this.panel3.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(255)))), ((int)(((byte)(192)))));
            this.panel3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel3.Controls.Add(this.edBottom);
            this.panel3.Controls.Add(this.label17);
            this.panel3.Controls.Add(this.edRight);
            this.panel3.Controls.Add(this.label16);
            this.panel3.Controls.Add(this.edLeft);
            this.panel3.Controls.Add(this.label15);
            this.panel3.Controls.Add(this.edTop);
            this.panel3.Controls.Add(this.label14);
            this.panel3.Controls.Add(this.label13);
            this.panel3.Controls.Add(this.label12);
            this.panel3.Location = new System.Drawing.Point(528, 130);
            this.panel3.Name = "panel3";
            this.panel3.Size = new System.Drawing.Size(208, 200);
            this.panel3.TabIndex = 30;
            // 
            // edBottom
            // 
            this.edBottom.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.edBottom.Location = new System.Drawing.Point(80, 136);
            this.edBottom.Name = "edBottom";
            this.edBottom.Size = new System.Drawing.Size(48, 20);
            this.edBottom.TabIndex = 26;
            this.edBottom.Text = "0";
            // 
            // label17
            // 
            this.label17.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label17.Location = new System.Drawing.Point(16, 160);
            this.label17.Name = "label17";
            this.label17.Size = new System.Drawing.Size(56, 16);
            this.label17.TabIndex = 25;
            this.label17.Text = "Last Col:";
            // 
            // edRight
            // 
            this.edRight.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.edRight.Location = new System.Drawing.Point(80, 160);
            this.edRight.Name = "edRight";
            this.edRight.Size = new System.Drawing.Size(48, 20);
            this.edRight.TabIndex = 24;
            this.edRight.Text = "0";
            // 
            // label16
            // 
            this.label16.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label16.Location = new System.Drawing.Point(16, 136);
            this.label16.Name = "label16";
            this.label16.Size = new System.Drawing.Size(85, 16);
            this.label16.TabIndex = 23;
            this.label16.Text = "Last Row:";
            // 
            // edLeft
            // 
            this.edLeft.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.edLeft.Location = new System.Drawing.Point(80, 112);
            this.edLeft.Name = "edLeft";
            this.edLeft.Size = new System.Drawing.Size(48, 20);
            this.edLeft.TabIndex = 22;
            this.edLeft.Text = "0";
            // 
            // label15
            // 
            this.label15.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label15.Location = new System.Drawing.Point(16, 112);
            this.label15.Name = "label15";
            this.label15.Size = new System.Drawing.Size(85, 16);
            this.label15.TabIndex = 21;
            this.label15.Text = "First Col:";
            // 
            // edTop
            // 
            this.edTop.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.edTop.Location = new System.Drawing.Point(80, 88);
            this.edTop.Name = "edTop";
            this.edTop.Size = new System.Drawing.Size(48, 20);
            this.edTop.TabIndex = 20;
            this.edTop.Text = "0";
            // 
            // label14
            // 
            this.label14.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label14.Location = new System.Drawing.Point(16, 88);
            this.label14.Name = "label14";
            this.label14.Size = new System.Drawing.Size(85, 16);
            this.label14.TabIndex = 3;
            this.label14.Text = "First Row:";
            // 
            // label13
            // 
            this.label13.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.label13.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label13.Location = new System.Drawing.Point(8, 32);
            this.label13.Name = "label13";
            this.label13.Size = new System.Drawing.Size(184, 32);
            this.label13.TabIndex = 2;
            this.label13.Text = "If any value is <=0 all print_range will be printed";
            // 
            // label12
            // 
            this.label12.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label12.Location = new System.Drawing.Point(8, 16);
            this.label12.Name = "label12";
            this.label12.Size = new System.Drawing.Size(192, 16);
            this.label12.TabIndex = 1;
            this.label12.Text = "Range to Export:";
            // 
            // label1
            // 
            this.label1.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label1.Location = new System.Drawing.Point(40, 16);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(80, 16);
            this.label1.TabIndex = 0;
            this.label1.Text = "File to export:";
            // 
            // panel8
            // 
            this.panel8.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
            this.panel8.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel8.Controls.Add(this.chPrintHeadings);
            this.panel8.Controls.Add(this.label24);
            this.panel8.Controls.Add(this.chFormulaText);
            this.panel8.Controls.Add(this.chGridLines);
            this.panel8.Location = new System.Drawing.Point(32, 130);
            this.panel8.Name = "panel8";
            this.panel8.Size = new System.Drawing.Size(176, 88);
            this.panel8.TabIndex = 37;
            // 
            // chPrintHeadings
            // 
            this.chPrintHeadings.Location = new System.Drawing.Point(16, 44);
            this.chPrintHeadings.Name = "chPrintHeadings";
            this.chPrintHeadings.Size = new System.Drawing.Size(144, 16);
            this.chPrintHeadings.TabIndex = 20;
            this.chPrintHeadings.Text = "Print Headings";
            // 
            // label24
            // 
            this.label24.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label24.Location = new System.Drawing.Point(8, 8);
            this.label24.Name = "label24";
            this.label24.Size = new System.Drawing.Size(192, 16);
            this.label24.TabIndex = 19;
            this.label24.Text = "Export Options:";
            // 
            // chFormulaText
            // 
            this.chFormulaText.Location = new System.Drawing.Point(16, 64);
            this.chFormulaText.Name = "chFormulaText";
            this.chFormulaText.Size = new System.Drawing.Size(136, 16);
            this.chFormulaText.TabIndex = 17;
            this.chFormulaText.Text = "Print Formula Text";
            // 
            // chGridLines
            // 
            this.chGridLines.Location = new System.Drawing.Point(16, 24);
            this.chGridLines.Name = "chGridLines";
            this.chGridLines.Size = new System.Drawing.Size(128, 16);
            this.chGridLines.TabIndex = 16;
            this.chGridLines.Text = "Print Grid Lines";
            // 
            // checkBox4
            // 
            this.checkBox4.Location = new System.Drawing.Point(0, 0);
            this.checkBox4.Name = "checkBox4";
            this.checkBox4.Size = new System.Drawing.Size(104, 24);
            this.checkBox4.TabIndex = 0;
            // 
            // exportDialog
            // 
            this.exportDialog.DefaultExt = "htm";
            this.exportDialog.Filter = "HTML files|*.htm|MHTML files|*.mht";
            // 
            // flexCelHtmlExport1
            // 
            this.flexCelHtmlExport1.HeadingWidth = 50D;
            this.flexCelHtmlExport1.ImageResolution = 96D;
            this.flexCelHtmlExport1.UsePrintScale = false;
            this.flexCelHtmlExport1.Workbook = null;
            this.flexCelHtmlExport1.HtmlFont += new FlexCel.Core.HtmlFontEventHandler(this.flexCelHtmlExport1_HtmlFont);
            // 
            // mainToolbar
            // 
            this.mainToolbar.ImageScalingSize = new System.Drawing.Size(24, 24);
            this.mainToolbar.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.openFile,
            this.export,
            this.btnEmail,
            this.toolStripSeparator1,
            this.btnClose});
            this.mainToolbar.Location = new System.Drawing.Point(0, 0);
            this.mainToolbar.Name = "mainToolbar";
            this.mainToolbar.Size = new System.Drawing.Size(768, 31);
            this.mainToolbar.TabIndex = 8;
            // 
            // openFile
            // 
            this.openFile.Image = ((System.Drawing.Image)(resources.GetObject("openFile.Image")));
            this.openFile.ImageTransparentColor = System.Drawing.Color.Magenta;
            this.openFile.Name = "openFile";
            this.openFile.Size = new System.Drawing.Size(85, 28);
            this.openFile.Text = "Open File";
            this.openFile.Click += new System.EventHandler(this.openFile_Click);
            // 
            // export
            // 
            this.export.Image = ((System.Drawing.Image)(resources.GetObject("export.Image")));
            this.export.ImageTransparentColor = System.Drawing.Color.Magenta;
            this.export.Name = "export";
            this.export.Size = new System.Drawing.Size(118, 28);
            this.export.Text = "Export as HTML";
            this.export.Click += new System.EventHandler(this.export_Click);
            // 
            // btnEmail
            // 
            this.btnEmail.Image = ((System.Drawing.Image)(resources.GetObject("btnEmail.Image")));
            this.btnEmail.ImageTransparentColor = System.Drawing.Color.Magenta;
            this.btnEmail.Name = "btnEmail";
            this.btnEmail.Size = new System.Drawing.Size(133, 28);
            this.btnEmail.Text = "Email (as MHTML)";
            this.btnEmail.Click += new System.EventHandler(this.btnEmail_Click);
            // 
            // toolStripSeparator1
            // 
            this.toolStripSeparator1.Name = "toolStripSeparator1";
            this.toolStripSeparator1.Size = new System.Drawing.Size(6, 31);
            // 
            // btnClose
            // 
            this.btnClose.Alignment = System.Windows.Forms.ToolStripItemAlignment.Right;
            this.btnClose.Image = ((System.Drawing.Image)(resources.GetObject("btnClose.Image")));
            this.btnClose.ImageTransparentColor = System.Drawing.Color.Magenta;
            this.btnClose.Name = "btnClose";
            this.btnClose.Size = new System.Drawing.Size(53, 28);
            this.btnClose.Text = "Exit";
            this.btnClose.Click += new System.EventHandler(this.button2_Click);
            // 
            // mainForm
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(768, 696);
            this.Controls.Add(this.mainToolbar);
            this.Controls.Add(this.panel1);
            this.Name = "mainForm";
            this.Text = "Export an Excel file to HTML";
            this.Load += new System.EventHandler(this.mainForm_Load);
            this.panel1.ResumeLayout(false);
            this.panel13.ResumeLayout(false);
            this.panel13.PerformLayout();
            this.panel12.ResumeLayout(false);
            this.panel12.PerformLayout();
            this.panel11.ResumeLayout(false);
            this.panel11.PerformLayout();
            this.panel10.ResumeLayout(false);
            this.panel10.PerformLayout();
            this.panel9.ResumeLayout(false);
            this.panel7.ResumeLayout(false);
            this.panel6.ResumeLayout(false);
            this.panel5.ResumeLayout(false);
            this.panel4.ResumeLayout(false);
            this.panel3.ResumeLayout(false);
            this.panel3.PerformLayout();
            this.panel8.ResumeLayout(false);
            this.mainToolbar.ResumeLayout(false);
            this.mainToolbar.PerformLayout();
            this.ResumeLayout(false);
            this.PerformLayout();

        }
        #endregion

        private ToolStrip mainToolbar;
        private ToolStripButton openFile;
        private ToolStripButton export;
        private ToolStripButton btnEmail;
        private ToolStripSeparator toolStripSeparator1;
        private ToolStripButton btnClose;
        private CheckBox sbSVG;
        private CheckBox cbEmbedImages;
    }
}


Mailform.cs

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

using FlexCel.Core;
using System.Text;

namespace ExportHTML
{
    /// <summary>
    /// Used for mailing.
    /// </summary>
    public partial class Mailform: System.Windows.Forms.Form
    {
        private string OriginalTo;
        private string OriginalFrom;
        private string OriginalServer;

        public Mailform()
        {
            InitializeComponent();

            OriginalTo = edTo.Text;
            OriginalFrom = edFrom.Text;
            OriginalServer = edOutServer.Text;
        }


        public mainForm MainForm;

        private bool ValidateFields()
        {
            if (OriginalTo == edTo.Text)
            {
                MessageBox.Show("Please change the 'TO' field to the user you want to send the email");
                edTo.Focus();
                return false;
            }

            if (OriginalFrom == edFrom.Text)
            {
                MessageBox.Show("Please change the 'From' field to the user you are using to send the email");
                edFrom.Focus();
                return false;
            }

            if (OriginalServer == edOutServer.Text)
            {
                MessageBox.Show("Please change the 'Outgoing Mail Server' field to the pop3 server you will use to send the email.");
                edOutServer.Focus();
                return false;
            }

            return true;

        }

        private void btnEmail_Click(object sender, System.EventArgs e)
        {
            if (!ValidateFields()) return;

            if (MessageBox.Show("Now we will try to send the email using the server '" + edOutServer.Text + "'\n" +
                "Note that this is a very simple implementation, and it will not work if the SMTP server needs to login.\n" +
                "For this to work, you need a mail server that authenticates when reading the email, and then login into your normal account with your normal mail reader.\n\n" +
                "If you need to authenticate in order to send mail, you will need to modify this code.",
                "Information", MessageBoxButtons.OKCancel, MessageBoxIcon.Information) != DialogResult.OK) return;



            SimpleMailer Mailer = new SimpleMailer();

            Mailer.FromAddress = edFrom.Text;
            Mailer.ToAddress = edTo.Text;
            Mailer.Subject = edSubject.Text;
            Mailer.HostName = edOutServer.Text;
            Mailer.Port = 25;

            try
            {
                Mailer.SendMail(MainForm.GenerateMHTML());
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error trying to send the message: " + ex.Message);
                return;
            }

            MessageBox.Show("Message has been sent. Please verify your JUNK folder or any filters, since it might be filtered as spam");
            Close();
        }

        private void edFrom_Leave(object sender, System.EventArgs e)
        {
            if (OriginalTo == edTo.Text && OriginalFrom != edFrom.Text)
            {
                edTo.Text = edFrom.Text;
            }
            FillServer();
        }

        private void FillServer()
        {
            if (OriginalServer == edOutServer.Text && OriginalFrom != edFrom.Text)
            {
                int AtPos = edFrom.Text.IndexOf("@");
                if (AtPos > 0)
                {
                    string Server = edFrom.Text.Substring(AtPos + 1);
                    edOutServer.Text = "mail." + Server;
                }
            }
        }
        private void edTo_Leave(object sender, System.EventArgs e)
        {
            if (OriginalFrom == edFrom.Text && OriginalTo != edTo.Text)
            {
                edFrom.Text = edTo.Text;
            }
            FillServer();

        }

    }
}

Mailform.Designer.cs

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using FlexCel.Core;
using System.Text;
namespace ExportHTML
{
    public partial class Mailform: System.Windows.Forms.Form
    {


        private System.Windows.Forms.Button btnEmail;
        private System.Windows.Forms.TextBox edOutServer;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.TextBox edTo;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.TextBox edFrom;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.TextBox edSubject;
        private System.Windows.Forms.Label label5;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Mailform));
            this.btnEmail = new System.Windows.Forms.Button();
            this.edOutServer = new System.Windows.Forms.TextBox();
            this.label2 = new System.Windows.Forms.Label();
            this.edTo = new System.Windows.Forms.TextBox();
            this.label3 = new System.Windows.Forms.Label();
            this.edFrom = new System.Windows.Forms.TextBox();
            this.label4 = new System.Windows.Forms.Label();
            this.edSubject = new System.Windows.Forms.TextBox();
            this.label5 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // btnEmail
            // 
            this.btnEmail.BackColor = System.Drawing.SystemColors.Control;
            this.btnEmail.Image = ((System.Drawing.Image)(resources.GetObject("btnEmail.Image")));
            this.btnEmail.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
            this.btnEmail.Location = new System.Drawing.Point(200, 200);
            this.btnEmail.Name = "btnEmail";
            this.btnEmail.Size = new System.Drawing.Size(70, 30);
            this.btnEmail.TabIndex = 4;
            this.btnEmail.Text = "e-mail!";
            this.btnEmail.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
            this.btnEmail.UseVisualStyleBackColor = false;
            this.btnEmail.Click += new System.EventHandler(this.btnEmail_Click);
            // 
            // edOutServer
            // 
            this.edOutServer.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.edOutServer.Location = new System.Drawing.Point(136, 144);
            this.edOutServer.Name = "edOutServer";
            this.edOutServer.Size = new System.Drawing.Size(304, 20);
            this.edOutServer.TabIndex = 3;
            this.edOutServer.Text = "pop.mycompany.com";
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(8, 152);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(128, 16);
            this.label2.TabIndex = 10;
            this.label2.Text = "Outgoing Mail Server:";
            // 
            // edTo
            // 
            this.edTo.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.edTo.Location = new System.Drawing.Point(136, 40);
            this.edTo.Name = "edTo";
            this.edTo.Size = new System.Drawing.Size(304, 20);
            this.edTo.TabIndex = 1;
            this.edTo.Text = "user@hiscompany.com";
            this.edTo.Leave += new System.EventHandler(this.edTo_Leave);
            // 
            // label3
            // 
            this.label3.Location = new System.Drawing.Point(16, 40);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(128, 16);
            this.label3.TabIndex = 14;
            this.label3.Text = "To:";
            // 
            // edFrom
            // 
            this.edFrom.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.edFrom.Location = new System.Drawing.Point(136, 8);
            this.edFrom.Name = "edFrom";
            this.edFrom.Size = new System.Drawing.Size(304, 20);
            this.edFrom.TabIndex = 0;
            this.edFrom.Text = "myname@mycompany.com";
            this.edFrom.Leave += new System.EventHandler(this.edFrom_Leave);
            // 
            // label4
            // 
            this.label4.Location = new System.Drawing.Point(16, 16);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(120, 16);
            this.label4.TabIndex = 12;
            this.label4.Text = "From:";
            // 
            // edSubject
            // 
            this.edSubject.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.edSubject.Location = new System.Drawing.Point(136, 80);
            this.edSubject.Name = "edSubject";
            this.edSubject.Size = new System.Drawing.Size(304, 20);
            this.edSubject.TabIndex = 2;
            this.edSubject.Text = "A test from FlexCel";
            // 
            // label5
            // 
            this.label5.Location = new System.Drawing.Point(16, 80);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(128, 16);
            this.label5.TabIndex = 16;
            this.label5.Text = "Subject:";
            // 
            // Mailform
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(472, 246);
            this.Controls.Add(this.edSubject);
            this.Controls.Add(this.edTo);
            this.Controls.Add(this.edFrom);
            this.Controls.Add(this.edOutServer);
            this.Controls.Add(this.label5);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.label4);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.btnEmail);
            this.Name = "Mailform";
            this.ShowInTaskbar = false;
            this.Text = "Send email...";
            this.ResumeLayout(false);
            this.PerformLayout();

        }
        #endregion
    }
}


Program.cs

using System;
using System.Windows.Forms;

namespace ExportHTML
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new mainForm());
        }
    }
}

SimpleMailer.cs

using System;
using System.Net.Sockets;
using System.IO;
using System.Threading;

using System.Globalization;
using System.Text;

namespace ExportHTML
{
    /// <summary>
    /// IMPORTANT: This is a really simple SMTP implementation, and it is not indented to be used in production.
    /// It is just mean to be use on this simple demo, as we cannot use third party solutions here.
    /// You are advised to get a third party solution if you want to implement this in your application.
    /// This code is based directly in RFC 2821: http://www.faqs.org/rfcs/rfc2821.html
    /// </summary>
    public class SimpleMailer
    {
        #region privates
        private string FHostName;
        private int FPort;

        private string FToAddress;
        private string FFromAddress;
        private string FSubject;
        #endregion

        #region Public properties
        public string HostName { get { return FHostName; } set { FHostName = value; } }
        public int Port { get { return FPort; } set { FPort = value; } }
        public string ToAddress { get { return FToAddress; } set { FToAddress = value; } }
        public string FromAddress { get { return FFromAddress; } set { FFromAddress = value; } }
        public string Subject { get { return FSubject; } set { FSubject = value; } }
        #endregion

        public SimpleMailer()
        {
            Port = 25;
        }

        public void SendMail(byte[] MessageData)
        {
            using (TcpClient Tcp = new TcpClient(HostName, Port))
            {
                using (NetworkStream Channel = Tcp.GetStream())
                {
                    try
                    {
                        WaitForAnswer(Channel, 220);
                        WriteCommand(Channel, "EHLO " + HostName);
                        WaitForAnswer(Channel, 250);

                        WriteCommand(Channel, "MAIL FROM:<" + FromAddress + ">");
                        WaitForAnswer(Channel, 250);
                        WriteCommand(Channel, "RCPT TO:<" + ToAddress + ">");
                        WaitForAnswer(Channel, 250);

                        WriteCommand(Channel, "DATA");
                        WaitForAnswer(Channel, 354);
                        SendMessage(Channel, MessageData);
                        WaitForAnswer(Channel, 250);
                    }

                    catch (SimpleMailerException)
                    {
                        //Quit must always be performed.
                        WriteCommand(Channel, "QUIT");
                        WaitForAnswer(Channel, 221);
                        return;
                    }

                    WriteCommand(Channel, "QUIT");
                    WaitForAnswer(Channel, 221);

                }
            }
        }

        public void WaitForAnswer(NetworkStream Channel, int AnswerCode)
        {
            byte[] ReadBuffer = new byte[1024];
            String Message = "";
            int numberOfBytesRead = 0;

            // Incoming message may be larger than the buffer size.
            do
            {
                numberOfBytesRead = Channel.Read(ReadBuffer, 0, ReadBuffer.Length);
                Message += Encoding.ASCII.GetString(ReadBuffer, 0, numberOfBytesRead);
            }
            while (Channel.DataAvailable);

            if (Message.StartsWith(AnswerCode.ToString(CultureInfo.InvariantCulture))) return;

            throw new SimpleMailerException("Error sending email. Answer from the server: " + Message);
        }

        public void WriteCommand(NetworkStream Channel, string Command)
        {
            byte[] WriteBuffer = Encoding.ASCII.GetBytes(Command + "\r\n"); //do not use Environment.NewLine here, since this is invariant and defined in the RFC
            Channel.Write(WriteBuffer, 0, WriteBuffer.Length);
        }

        public void SendMessage(NetworkStream Channel, byte[] MessageData)
        {
            WriteCommand(Channel, "From: " + FromAddress);
            WriteCommand(Channel, "To: " + ToAddress);
            WriteCommand(Channel, "Subject: " + Subject);
            WriteCommand(Channel, "Date: " + DateTime.Now.ToUniversalTime().ToString("r", CultureInfo.InvariantCulture));

            WriteEscapedData(Channel, MessageData);
            WriteCommand(Channel, "\r\n."); //do not use Environment.NewLine here, since this is invariant and defined in the RFC
        }

        /// <summary>
        /// In order to send the data trough the channel, we need to detect any dot at the start of a line and replace it by ".."
        /// If not, it might be interpreted as an EOF sign. We can easily loop in the MessageData array, since it only contains ASCII characters, so there are no
        /// unicode colation issues.
        /// </summary>
        /// <param name="Channel"></param>
        /// <param name="MessageData"></param>
        public void WriteEscapedData(NetworkStream Channel, byte[] MessageData)
        {
            if (MessageData.Length > 0)
            {
                if (MessageData[0] == '.') Channel.WriteByte((byte)'.');
                Channel.WriteByte(MessageData[0]);
            }

            for (int i = 1; i < MessageData.Length; i++)
            {
                if (MessageData[i - 1] == '\n' && MessageData[i] == '.')
                {
                    Channel.WriteByte((byte)'.');
                }
                Channel.WriteByte(MessageData[i]);
            }
        }

    }

    public class SimpleMailerException: IOException
    {
        public SimpleMailerException(string Message) : base(Message)
        {

        }
    }
}