AcceptEx返回FALSE而WSAGetLastError却返回0，叫小弟我情何以堪

AcceptEx返回FALSE而WSAGetLastError却返回0，叫我情何以堪！
代码如下：

C/C++ code


BOOL CServer::PostAccept(CHandleData* pHandleData, CIoData *pIoData)
{
    pIoData->OperationType = IO_TYPE_ACCEPT;
    DWORD dwBytesRecv = 0;
    pHandleData->accSock =  WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED);
    BOOL b = AcceptEx(m_ListenSock, pHandleData->accSock, pIoData->szBuff,  0/*表示尽快建立连接，不等待数据*/,
        sizeof(sockaddr)+16,    sizeof(sockaddr)+16, &dwBytesRecv, (LPOVERLAPPED)&pIoData);
    
    if(!b){
        int err = WSAGetLastError();
        if(err != WSA_IO_PENDING){
            SetErrorString(_T("IO_TYPE_ACCEPT出错！"));
            return FALSE;
        }
    }

    pHandleData->pIOData = pIoData;
    return TRUE;
}

------解决方案--------------------
前者false表示失败，后者0一定表示成功吗？

我没看这个api的文档，但应该有说明吧？
------解决方案--------------------
Code Description Name
0 The operation completed successfully. ERROR_SUCCESS

------解决方案--------------------
Note: The function pointer for the AcceptEx function must be obtained at run time by making a call to the WSAIoctl function with the SIO_GET_EXTENSION_FUNCTION_POINTER opcode specified. The input buffer passed to the WSAIoctl function must contain WSAID_ACCEPTEX, a globally unique identifier (GUID) whose value identifies the AcceptEx extension function. On success, the output returned by the WSAIoctl function contains a pointer to the AcceptEx function. The WSAID_ACCEPTEX GUID is defined in the Mswsock.h header file.

------解决方案--------------------
http://blog.csdn.net/visualeleven/article/details/6088590
这里有个使用的例子代码~
------解决方案--------------------
pHandleData->accSock = WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED);
这里改成：
pHandleData->accSock = WSASocket(AF_INET,SOCK_STREAM,IPPROTO_TCP,NULL,0,WSA_FLAG_OVERLAPPED);
试试吧。。。

AcceptEx返回FALSE而WSAGetLastError却返回0，叫小弟我情何以堪

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