void gtk_window_fullscreen_on_monitor ( GtkWindow* window, GdkScreen* screen, gint monitor )
Asks to place
window in the fullscreen state. Note that you shouldn’t assume
the window is definitely full screen afterward.
You can track the fullscreen state via the “window-state-event” signal
Available since: 3.18
GdkScreento draw to.
The data is owned by the caller of the method.
Which monitor to go fullscreen on.