Obtains the parent of
window, as known to GDK. Does not query the
X server; thus this returns the parent as passed to gdk_window_new(),
not the actual parent. This should never matter unless you’re using
Xlib calls mixed with GDK calls on the X11 platform. It may also
matter for toplevel windows, because the window manager may choose
to reparent them.
Note that you should use
writing generic code that walks up a window hierarchy, because
gdk_window_get_parent() will most likely not do what you expect if
there are offscreen windows in the hierarchy.
|The returned data is owned by the instance.