text: // 
  // Birthday app
  //
  // Create a window that pretty much runs itself.
  //
  
  #include <FL/Fl.H>
  #include "Birthday_win.hpp"
  
  using namespace Simple_graphics;
  
  int main()
  {
      constexpr int x_max = 800;
      constexpr int y_max = 450;
      constexpr Point top_left {100, 100};
  
      Thin_factory fac;             // factory determines widget sizes
      Birthday_win pwin {top_left, x_max, y_max, "Birthday", fac};
      return Fl::run();
  }
  