.fullscreen () on windows

[Bart Verstraete <bartverstraete telenet be>]

why doesn't this work on windows I don't get a error:

#include <gtkmm/main.h>
#include <gtkmm/window.h>

int main(int argc, char *argv[])
{
   Gtk::Main kit(argc, argv);

   Gtk::Window window;

   Gtk::Main::run(window);
  
   window.fullscreen();
  
   return 0;
}

pls  some heelp
grts Bart