typedef void __fastcall (__closure *TDragDropEvent)(System::TObject* Sender, const TDragObject &Data, const System::Types::TPointF &Point);
Procedural type that is used for all OnDragDrop event types.
A TDragDropEvent event handler must be called with the following parameters:
Sender--a pointer to the object that called this function.
Data--the dragged object.
Point--the current point of the mouse pointer within the client area of the control.