a window which may be at the pointer position, but should be ignored, since it is put up by the drag source as an icon.
the screen where the destination window is sought.
the x position of the pointer in root coordinates.
the y position of the pointer in root coordinates.
location to store the destination window in. out
location to store the DND protocol in. out
Finds the destination window and DND protocol to use at the given pointer position. This function is called by the drag source to obtain the dest_window and protocol parameters for gdk_drag_motion(). Since 2.2