[ CCode ( cprefix = "GDK_INPUT_" , type_id = "gdk_window_window_class_get_type ()" ) ]
public enum WindowWindowClass
GDK_INPUT_OUTPUT windows are the standard kind of window you might expect.
Such windows receive events and are also displayed on screen. GDK_INPUT_ONLY windows are invisible; they are usually placed
above other windows in order to trap or filter the events. You can’t draw on GDK_INPUT_ONLY windows.