#include "graphapp.h"
void do_it(button b)
{
beep();
}
void main(void)
{
window w;
button b;
w = newwindow("Listen...", rect(20,20,400,300),
StandardWindow);
b = newbutton("Press", rect(10,10,80,30), do_it);
show(w);
mainloop();
}