Enables you to custom paint the Filter Panel.
[DXCategory("CustomDraw")] public event CustomDrawObjectEventHandler CustomDrawFilterPanel
<DXCategory("CustomDraw")> Public Event CustomDrawFilterPanel As CustomDrawObjectEventHandler
The CustomDrawFilterPanel event's data class is DevExpress.XtraTreeList.CustomDrawObjectEventArgs.
The CustomDrawFilterPanel event is raised before the filter panel is painted. See the Custom Draw Scenarios topic for information on using custom draw events.
Never change cell values or modify the control's layout on this event, or any other event designed to tune the control's appearance. Any action that causes a layout update can cause the control to malfunction.