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Dispatch a drag message, sent by the DragManager
Source position: controls.pp line 1134
protected function TControl.DoDragMsg( |
ADragMessage: TDragMessage; |
APosition: TPoint; |
ADragObject: TDragObject; |
ATarget: TControl; |
ADocking: Boolean |
):LRESULT; virtual; |
On dmFindTarget: return Self for the DropOnControl. On dmDragEnter/Leave/Move: invokes DragOver or, if docking, the target.DockOver. Result indicates acceptance of an drop. When the DragObject has been AutoCreated, the dragged control is passed to DragOver as the Sender; otherwise the DragObject itself is passed as Sender. On dmDragDrop: invokes DragDrop or, if docking, the target.DockDrop. Returns nothing!
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