C / C++ / MFC

WSAEVENT event;
WSANETWORKEVENTS netevents;

event = WSACreateEvent();
WSAEventSelect(s, event, FD_READ | FD_CLOSE);

DWORD result, lIdleTimeout;
lIdleTimeout=0


while (TRUE)
{
    result = WSAWaitForMultipleEvents(1, &event, FALSE, 100, FALSE);

    if (result == WSA_WAIT_TIMEOUT)
    {
        if (++lIdleTimeout > IDLE_CONNECTION_TIMEOUT)
        {
            // close this idle connection
            closesocket(s);
            return FALSE;
        }
        continue;
    }

    lIdleTimeout=0;

    WSAEnumNetworkEvents(s, event, &netevents);

    if (netevents.lNetworkEvents & FD_CLOSE) {
        // handle socket closure
        printf ("socket closed\n");
        return TRUE;
    }

    if (netevents.lNetworkEvents & FD_READ) {
        // handle a read

        continue;
    }
}

class CYourEditCtrl 
{
   protected:
      BOOL bTextSet;

   .....
}


void CYourEditCtrl::OnSetText( ... )
{
   if (bTextSet) {
      // clear the flag and do nothing
      bTextSet = FALSE;
      return;
   }

   bTextSet=TRUE;
   SetText(....);
 
   return;
}