gdk-window-effective-toplevel (window)

window -- a gdk-window object

The effective gdk-window toplevel containing window.

Gets the toplevel window that is an ancestor of window.

Works like the function gdk-window-toplevel, but treats an offscreen window's embedder as its parent, using the function gdk-window-effective-parent.

See also the function gdk-offscreen-window-embedder.