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 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
Warning gdk_drag_find_window has been deprecated since version 2.24 and should not be used in newly-written code. Use gdk_drag_find_window_for_screen() instead. 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().