Есть такой кусок кода, основная задача которого транслировать сообщения из ком-порта в сеть и наоборот:

dwError = WaitForMultipleObjects(4, params->hEventsArray, FALSE, INFINITE);
switch (dwError)
{
case WAIT_OBJECT_0: // shutdown event
    TRACE("[ReceiverThread]: Shutdown event\n");

    WSACloseEvent(params->hNetworkEvent);

    closesocket(sockListen);
    WSACleanup();
    bThreadAlive = false;
    bWorking = false;

    break;

case WAIT_OBJECT_0 + 1: // write to COM Port event
    TRACE("[ReceiverThread]: Write to COM Port event\n");

    // write message to serial port;

    break;

case WAIT_OBJECT_0 + 2: // read from COM Port event
    TRACE("[ReceiverThread]: Read from COM Port event\n");

    // read message from serial port

    break;

case WAIT_OBJECT_0 + 3: // async socket event
    if (!WSAEnumNetworkEvents(sockListen, params->hNetworkEvent, &wsaNetworkEvents))
    {
        TRACE("[ReceiverThread]: Async socket event (0x%x): ", wsaNetworkEvents.lNetworkEvents);

        if (wsaNetworkEvents.lNetworkEvents & FD_CONNECT)
        {
            TRACE("FD_CONNECT\n");

            if (!wsaNetworkEvents.iErrorCode[FD_CONNECT_BIT])
            {
                // FD_CONNECT event has occured. Don't serve it
            }
            else
            {
                // error occured
                TRACE("[ReceiverThread]: Error on FD_CONNECT!\n");
            }
        }

        if (wsaNetworkEvents.lNetworkEvents & FD_WRITE)
        {
            TRACE("FD_WRITE\n");

            if (!wsaNetworkEvents.iErrorCode[FD_WRITE_BIT])
            {
                // FD_WRITE event has occured. Don't serve it
            }
            else
            {
                // error occured
                TRACE("[ReceiverThread]: Error on FD_WRITE!\n");
            }
        }

        if (wsaNetworkEvents.lNetworkEvents & FD_READ)
        {
            TRACE("FD_READ\n");

            if (!wsaNetworkEvents.iErrorCode[FD_READ_BIT])
            {
                if (params->LogonStage)
                    iMsgSize = Receiver.NetworkMessageReceive(sockListen, &InBuffer, analyzer.actual_key);
                else
                    iMsgSize = recv(sockListen, (char *) InBuffer, CWS_NETMSGSIZE, 0);

                iMsgSize = ReceiverAnalyze(params, SYSTEM_SERVER, InBuffer, iMsgSize, OutBuffer);
                if (iMsgSize > 0)
                {
                    if (Receiver.NetworkMessageSend(sockListen, OutBuffer, iMsgSize, analyzer.actual_key))
                    {
                        // TODO: Error!
                        TRACE("[ReceiverThread]: NetworkMessageSend() error!\n");
                    }
                }
            }
            else
            {
                // error occured
                TRACE("[ReceiverThread]: Error on FD_READ!\n");
            }
        }

        if (wsaNetworkEvents.lNetworkEvents & FD_CLOSE)
        {
            TRACE("FD_CLOSE\n");

            if (!wsaNetworkEvents.iErrorCode[FD_CLOSE_BIT])
            {
                ::PostMessage(settings->hWnd, WM_TRANSLATETHREAD_MESSAGE, (WPARAM) MSG_STOP_THREAD, (LPARAM) ERROR_CONNECTION_CLOSED);
            }
            else
            {
                // error occured
                TRACE("[ReceiverThread]: Error on FD_CLOSE!\n");
            }
        }
    }

При его работе происходит пошаговое установление соединения с сервером. При этом, при вызове
WSAEnumNetworkEvents, возникает событие при котором lNetworkEvents = 0, хотя такого быть не должно.

Поскажите, плиз, где здесь косяк

Вот кусок лога, взятого при отладке программы:
[ReceiverThread]: Thread started!
[CSerialPort] COM port: COM1, def string: baud=9600 parity=N data=8 stop=1
[CSerialPort] Initialization for COM port 1 completed
'CSTranslator.exe': Loaded 'C:\WINNT\system32\msafd.dll', Cannot find or open a required DBG file.
'CSTranslator.exe': Loaded 'C:\WINNT\system32\wshtcpip.dll', Cannot find or open a required DBG file.
[ReceiverThread]: Async socket event (0x13): FD_CONNECT
FD_WRITE
FD_READ
[ReceiverAnalyze]: Received hash key
[ReceiverThread]: Async socket event (0x1): FD_READ
[ReceiverAnalyze]: MSG_LOGIN_ACK received
[ReceiverThread]: Async socket event (0x0): [ReceiverThread]: Async socket event (0x20): FD_CLOSE
Got message from thread! wParam = 0x0, lParam = 0x2
[ReceiverThread]: Shutdown event
'CSTranslator.exe': Unloaded 'C:\WINNT\system32\wshtcpip.dll'
[CSerialPort]: destructor

Спасибо, Дима