// thread worker function (if it returns true, thread will continue running)
  bool TCPIocpThread::run (float _dtInSeconds)
  {
    TCPSocketIocp* iocp_socket;

    // 1st parameter is the value we passed when creating the completion port 
    // so we can cast the dword pointer to whatever type we used on creation
    // note: m_iocp is a small wrapper over 'CreateIoCompletionPort' et al.
    // getStatus wraps GetQueuedCompletionStatus
    m_iocp.getStatus((PDWORD_PTR)&iocp_socket, &dwIoSize, (OVERLAPPED**)&overlapped);

    // todo: sth with "extended overlapped struct" 
    if (dwIoSize)
    {
      iNetCallback* handler = iocp_socket->m_pHandler;

      char buf[1024] = {0};
      ULONG ulFlags = 0; //MSG_PARTIAL;
      DWORD dwSize = 0;
      WSABUF wsabuf = { dwIoSize, (char*)buf };
      U32 nRetVal = WSARecv(iocp_socket->m_Socket, &wsabuf, 1, &dwSize, &ulFlags, &overlapped, NULL); //&iocpOverlappedCompletion);

      // if an error occurred and it was not an IO PENDING error, output it
      if(nRetVal == SOCKET_ERROR)
      {
        int errCode = WSAGetLastError();
        if(errCode != WSA_IO_PENDING)
        {
          switch(errCode)
          {
            // handle error
            //handler->cb_on_error ( "errorstring" );
          }
        }
      }

      if (dwSize)
      { // callback into my application with the received data
        handler->cb_received_Data (0,ulFlags,1,0, buf, dwSize);
    }
    return true;
  }