These are hints originally defined by the Motif toolkit. The window manager can use them when determining how to decorate the window. The hint must be set before mapping the window.

(define-g-flags "GdkWMDecoration" gdk-wm-decoration
  (:export t
   :type-initializer "gdk_wm_decoration_get_type")
  (:all 1)
  (:border 2)
  (:resizeh 4)
  (:title 8)
  (:menu 16)
  (:minimize 32)
  (:maximize 64))  

:all

All decorations should be applied.

:border

A frame should be drawn around the window.

:resizeh

The frame should have resize handles.

:title

A titlebar should be placed above the window.

:menu

A button for opening a menu should be included.

:minimize

A minimize button should be included.

:maximize

A maximize button should be included.