TDBDropDown Control Events

ClassicRead	Fired when the drop-down needs unbound data for display.
Click	Fired when a mouse click occurs.
ColMove	Occurs before repainting when columns are moved.
ColResize	Occurs before repainting when a column is resized.
DataSourceChanged	Fired when the data source changes.
DblClick	Fired when a mouse double click occurs.
DropDownClose	Fired when the drop-down is closed.
DropDownOpen	Fired when the drop-down is displayed.
Error	Occurs when an associated action fails.
FetchCellStyle	Fired when the FetchStyle property is set to dbgFetchCellStyleColumn or dbgFetchCellStyleAddNewColumn for a column.
FirstRowChange	Fired when the FirstRow property changes.
FootClick	Occurs when a column footer has been clicked.
FormatText	Fired when specified by the NumberFormat property.
HeadClick	Occurs when a column header has been clicked.
KeyDown	Occurs when a key is pressed.
KeyPress	Occurs when an ANSI key is pressed and released.
KeyUp	Occurs when a key is released.
LayoutReady	Fired when downloading of a layout file is complete.
LeftColChange	Fired when the LeftCol property changes.
MouseDown	Occurs when a mouse button is pressed.
MouseMove	Occurs when the mouse moves.
MouseUp	Occurs when a mouse button is released.
Paint	Fired when the drop-down repaints itself.
PostEvent	Occurs after a PostMsg method is called.
RowChange	Occurs when a different row becomes current.
RowResize	Occurs when rows are resized.
Scroll	Occurs when the drop-down is scrolled with the scroll bars.
SelChange	Occurs when the current selected cell range changes.
UnboundColumnFetch	Fetches unbound column data when the control is bound.
UnboundFindData	Fired when the drop-down needs to find a row.
UnboundGetRelativeBookmark	Fired when the drop-down needs a relative bookmark.
UnboundReadData	Fired when the drop-down needs unbound data for display.
UnboundReadDataEx	Fired when the drop-down needs unbound data for display.
ValueItemError	Fired when invalid data is typed into a ValueItems column.