Sets or obtains whether the window has been set to have decorations.
true if the window has been set to have decorations.
With this property you control if a window will be decorated or not.
By default, windows are decorated with a title bar and resize controls. Some window managers allow to disable these decorations, creating a borderless Window. If you set this property as false, Gtk# will try to convince the window manager not to decorate the window.