> #include <FL/Fl.H>
> #include <FL/Fl_Window.H>
> #include <FL/Fl_Secret_Input.H>
> #include <iostream>
>
> class myWindow : public Fl_Window {
> public:
>      myWindow(int x, int y, const char* l) : Fl_Window(x, y, l) { }
>
>      virtual int handle(int event) {
         if (event== FL_SHORTCUT)
         {
>          static int n = 0;
>          if (Fl::event_state() & FL_CAPS_LOCK) {
>              std::cout << "caps lock" << " " << ++n << std::endl;
>          } else {
>              std::cout << "caps unlock" << " " << ++n << std::endl;
>          }
           return 1;
         }
        else
>          return Fl_Window::handle(event);
>      }
> };
>
> int main(int argc, char* argv[]) {
>      myWindow* win = new myWindow(300, 200, "");
>
        new Fl_SecretInput(20, 20, 100, 15, "");
>
>      win->end();
>      win->show();
>
>      return Fl::run();
> }

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