TTMSFNCToolBarFontSizePicker.OnBeforeDropDown Event
Fires before the drop-down popup opens. Use it to update popup content dynamically.
API unit family: TMSFNCToolBar
Declaring type: TTMSFNCToolBarFontSizePicker
Inherited from: TTMSFNCToolBarButton
Type: TNotifyEvent
Syntax
property OnBeforeDropDown: TNotifyEvent;