🚀 go-pugleaf

the following code works fine on all the computers i've installed my 
program on bar one. its running windows xp pro. the problem is i keep on 
getting error posting message: error invalid thread id. on all other 
computers it works fine and some of them also run xp pro.

if (tThread) {
     if (!PostThreadMessage(tThread->ThreadID, TH_INCOMING, NULL, NULL))
        Log("Error Posting Message: " + SysErrorMessage(GetLastError()));
}

in the thread i then have...

  while (!Terminated) {
        MSG Msg;
        ZeroMemory(&Msg, sizeof(MSG));
        if (PeekMessage(&Msg, NULL, 0, 0, PM_REMOVE)) {
           switch (Msg.message) {
                  case TH_ALL:
                       ManualCheckNow();
                       ManualSendNow();
                       break;
                  case TH_INCOMING:
                       ManualCheckNow();
                       break;
                  case TH_OUTGOING:
                       ManualSendNow();
                       break;
                  case TH_SENDORDER:
                       SendOrder();
                       break;
                  case TH_UPDATEINC:
                       NextIncomingCheckTime();
                       break;
                  case TH_UPDATEOUT:
                       NextOutgoingCheckTime();
                       break;
                  case TH_XMLSEND:
                       XmlSend();
                       break;
           };
        }

        if (Main_Form->Dialled)
           Main_Form->RasDial->Disconnect();

        CatchUp();

        ::Sleep(0);
  }

any ideas?

TIA