完成端口GetQueuedCompletionStatus()返回错误，怎样获得真正的错误代码

GetQueuedCompletionStatus()返回错误，说明I/O失败。此时调用GetLastError()得到的往往是ERROR_NETNAME_DELETED（64），WSAGetLastError()也一样，这显然不是真正的错误代码，那么怎么得到真正的错误代码呢？

给出下面的代码：

int YourIOCPClass::GetSockError(WSAOVERLAPPED* pWSAOVERLAPPED){DWORD dwTrans;DWORD dwFlags;if(FALSE == WSAGetOverlappedResult(m_IOSock, pWSAOVERLAPPED, &dwTrans, FALSE, &dwFlags))return WSAGetLastError();elsereturn ERROR_SUCCESS;}

使用了WSAGetOverlappedResult()函数，封装一下就可以用在代码里了：）