Creating Buttons

#include "graphapp.h"

void quit(button b)
{
  exitapp();
}

void main(void)
{
  window w;
  button b;

  w = newwindow("Pizza", rect(0,0,200,150), StandardWindow);
  b = newbutton("Quit", rect(10,10,80,30), quit);
  show(w);
  mainloop();
}

• Use newbutton to create push buttons.
• The button callback lets you perform an action.
• The exitapp function cleanly exits the program.
• Source code: button.c