Call this method when the drag operation started by a [!:IRenderWebBrowser.StartDragging] call has ended either in a drop or by being cancelled. If the web view is both the drag source and the drag target then all DragTarget* methods should be called before DragSource* methods. This method is only used when window rendering is disabled.

void DragSourceEndedAt(
	int x,
	int y,
	DragOperationsMask op
)

void DragSourceEndedAt(
	int x, 
	int y, 
	DragOperationsMask op
)