TTMSFNCDataGridBeforeDropHeaderGroupEvent Event Type

Fired before a dragged column header or chip is dropped into the visual grouping zone.

API unit family: TMSFNCDataGrid

Remarks

Fires both when a new column is dropped and when an existing chip is moved to another position or level. When cancelled, TTMSFNCCustomDataGrid.OnAfterDropHeaderGroup is not fired.

Parameters

Name	Description
Sender	Grid that fired the event.
AColumn	Zero-based index of the column being dropped.
ACanDrop	True by default. Set to False to cancel the drop so the grouping stays unchanged.