How to implement Multi-threading

I am building an SDI MFC application which has a user interface class and a database class.  I am also using a virtual device driver to access the network interface card in a promiscuous mode.  The packet monitor function makes a call to DeviceIoControl to retrieve any packets that arrive at the NIC.  Since at any moment, there may or may not be a packet to read, I call GetOverlappedResult which waits indefinetly for a packet arrival.  This, of course locks up the many windows GUI messages I am using to update the GUI, since windows is in a single thread mode and I am blocking any other progress.  How should I implement this function to run under a separate thread and still have the packet results available to the other thread?

Thanks
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bknouseAsked:
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Tommy HuiEngineerCommented:
You need to create a function that matches this prototype:

  LRESULT MyThreadedFunc(LPVOID param);

Then you can use AfxBeginThread(MyThreadedFunc, anyParam);

You also need to structure your code so that it is doing something like

  {
    while (TRUE)
    {
      GetOverlappedResult(...);
      /* communicated with program that result is ready */
    }
  }


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