gdk-window-restack (window sibling above)

window -- a gdk-window object
sibling -- a gdk-window object that is a sibling of window, or nil
above -- a boolean

Changes the position of the window in the z-order (stacking order), so that it is above sibling, if above is true, or below sibling, if above is false.

If sibling is nil, then this either raises, if above is true, or lowers the window.

If window is a toplevel, the window manager may choose to deny the request to move the window in the z-order, the function gdk-window-restack only requests the restack, does not guarantee it.