U0 MsgLoop()
{
  I64 arg1,arg2,msg_code;
  "Use 
msg_code defines in your programs instead of hardcoded nums.\n"
  "<ESC> to Exit\n";
  //We don't want the mouse bttns to reposition the cursor,
  //so we inhibit the window mgr from processing them.
  Fs->win_inhibit=WIF_SELF_MS_L|WIF_SELF_MS_R;
  do
  {
    msg_code=GetMsg(&arg1,&arg2,~(1<<MSG_NULL));
    "CMD:%02X ARG1:%08X ARG2:%016X\n"
    ,msg_code,arg1,arg2;
  }
  while (msg_code!=MSG_KEY_DOWN || arg1!=CH_ESC && arg1!=CH_SHIFT_ESC);
  GetMsg(,,1<<MSG_KEY_UP);
  Fs->win_inhibit=WIG_USER_TASK_DFT;
}

MsgLoop;

// Press <CTRL-SHIFT-L> and "Insert ASCII/ScanCode".