gdk:window-type-hint (window)

window -- a gdk:window toplevel object
hint -- a gdk:window-type-hint value with the type hint this window will have

The type hint set for the window. The gdk:window-type-hint function returns the type hint set for a the window. The (setf gdk:window-type-hint) function sets the type hint.

The application can use this call to provide a hint to the window manager about the functionality of a window. The window manager can use this information when determining the decoration and behaviour of the window.

The hint must be set before the window is mapped.