完成端口GetQueuedCompletionStatus()返回错误，怎样获得真正的错误代码，错误返回64解决办法

GetQueuedCompletionStatus()返回错误，说明I/O失败。此时调用GetLastError()或WSAGetLastError()得到的往往是ERROR_NETNAME_DELETED（64），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？代码如下

int YourIOCPClass::GetSockError(SOCKET
m_Socket ，WSAOVERLAPPED* pWSAOVERLAPPED/*重叠结构指针*/)

{

DWORD dwTrans;

DWORD dwFlags;

if(FALSE == WSAGetOverlappedResult(m_Socket, pWSAOVERLAPPED, &dwTrans, FALSE, &dwFlags))

return WSAGetLastError();

else

return ERROR_SUCCESS;

}