text: #include <FL/Fl.H>
  #include <FL/Fl_Window.H>
  
  namespace Examples {
    class Main_Window : public Fl_Window {
    public:
      Main_Window() : Fl_Window(200, 100, 300, 300, "Test gui") { 
      }
    };
  }
  
  int main(int argc, char* argv[]) {
    Examples::Main_Window window;
    window.show(argc, argv);
    Fl::run();
  }
  