Re: ReadMsgQueue() always returns TIMEOUT

I have a thread that listens on a system message queue, but
ReadMsgQueue() always fails and GetLastError() returns 0x0005b4 "This
operation returned because the timeout period expired."
The code below shows how I'm using the MsgQueue API. I've tried
ReadMsgQueue() timeout values of INFINITE, 0, 1, and 500. With
INFINITE, I never return from ReadMsgQueue(). Can anybody tell me where
I'm going wrong?

Thanks,
-PaulH

UINT MessageThread()
{
    MSGQUEUEOPTIONS sOptions;
    sOptions.dwSize = sizeof(MSGQUEUEOPTIONS);
    sOptions.dwFlags = MSGQUEUE_ALLOW_BROKEN;
    sOptions.dwMaxMessages = DEFAULT_MAX_MESSAGES;
    sOptions.cbMaxMessage = sizeof(LOG_ENTRY);
    sOptions.bReadAccess = TRUE;

    HANDLE hMsgQueue = CreateMsgQueue(ODD_MSGQUEUE_NAME, &sOptions);
    if (hMsgQueue == NULL)
    {
        //unable to open msg queue
        return 1;
    }

    while (m_bRunning)
    {
        if (WaitForSingleObject(hMsgQueue, 1000) != WAIT_OBJECT_0)
            continue;

        LOG_ENTRY LogEntry = { 0 };
        DWORD dwFlags = 0;
        DWORD dwBytesReturned = 0;

        while (ReadMsgQueue(hMsgQueue,
                            &LogEntry,
                            sizeof(LOG_ENTRY),
                            &dwBytesReturned,
                            1,
                            &dwFlags))
        {
            //do stuff with message...
        }
    }

    CloseMsgQueue(hMsgQueue);
    return 0;
}