gtk:window-decorated (object)

object -- a gtk:window widget
setting -- true to decorate the window

The accessor for the decorated slot of the gtk:window class gets or sets whether the window should be decorated by the window manager.

By default, windows are decorated with a title bar, resize controls, and so on. Some window managers allow GTK to disable these decorations, creating a borderless window. If you set the decorated property to false using this function, GTK will do its best to convince the window manager not to decorate the window. Depending on the system, this function may not have any effect when called on a window that is already visible, so you should call it before calling the gtk:widget-visible function.

On Windows, this function always works, since there is no window manager policy involved.