Maximize The Window

	gtk_window_maximize(GTK_WINDOW(MainWindow));

Resizable

	gtk_window_set_resizable(GTK_WINDOW(MainWindow), FALSE);

 

Hide the title bar etc

	gtk_window_set_decorated(GTK_WINDOW(MainWindow), false);			//Request the window title bar to be hidden, use before gtk_widget_show()

Set Fullscreen

Fill entire screen, displaying over the top of the taskbar panel.

	gtk_widget_show(fixed);

	//Make the window fullscreen
	gtk_window_fullscreen(GTK_WINDOW(MainWindow));