dict = WSAEnumNetworkEvents(s, hEvent )
Return network events that caused the event associated with the socket to be signaled.
Return ValueA dictionary mapping network events that occured for the specified socket since the last call to this function (e.g. FD_READ, FD_WRITE) to their associated error code, or 0 if the event occured without an error. The events returned are a subset of events previously registered for this socket with WSAEventSelect.