C / C++ / MFC

SetTimer(hWnd, IDT_TIMER1, TIMER_INTERVAL, (TIMERPROC)HiddenSendDataProc);
MSG msg;          // message structure
while (GetMessage(&msg, // message structure
       NULL,           // handle to window to receive the message
       NULL,           // lowest message to examine
       NULL)          // highest message to examine
          != 0 && GetMessage(&msg, NULL, NULL, NULL) != -1)
  {
    // Post WM_TIMER messages to the hwndTimer procedure.
    if (msg.message == WM_TIMER)
    {
      msg.hwnd = hWnd;
      HiddenSendDataProc(hWnd, WM_TIMER, 0, 0);
    }
    TranslateMessage(&msg); // translates virtual-key codes
    DispatchMessage(&msg);  // dispatches message to window
  }