const CallBackp MyGraphics1 = {
  &box
};

const CallBackp MyGraphics2 = {
  &cross
};

const CallBack_Object draw_box = {
   .type = CallBack,
   .data = (CallBackp *)&MyGraphics1
};

const CallBack_Object draw_cross = {
   .type = CallBack,
   .data = (CallBackp *)&MyGraphics2
};