有个关于网络编程的异常，麻烦帮小弟看看

有个关于网络编程的错误，麻烦帮小弟看看！
这个是发送消息线程，但是有错，我调试了，每次执行到sockClient.Create();就出错，但是我不知道这句话错在哪里了，求指点

C/C++ code

/////TCP发送信息线程//////////
UINT _SendMsgThread(LPVOID lparam)    
{
    //
    CTestDlg *pDlg=(CTestDlg *)lparam;
    //if(pDlg->StopServer==true)    return -1;
    //pThreadLisen=::AfxBeginThread(_ListenTcpThread,this);    //开始TCP线程
    CSocket sockClient;
    sockClient.Create();
    CString ip,strError;
    //pDlg->m_You_IP.GetWindowText(ip);
    int conn=sockClient.Connect(otherip, PORT+pDlg->m_client);
    if(conn==0)    ///////////////////////////////////
    {
        AfxMessageBox("_SendMsgThread Connect错误!"+pDlg->GetError(GetLastError()));
        sockClient.ShutDown(2);
        sockClient.Close();
        AfxEndThread(1L);
        return 0;
        
    }
    //首先发送标记M为信息,2
    int end=0;
    end=sockClient.Send("M",FLAG); 
    if(end==SOCKET_ERROR)
    {
        AfxMessageBox("_SendMsgThread Send错误!"+pDlg->GetError(GetLastError()));
        return -1;
    }
    else if(end!=2)
    {
        AfxMessageBox("消息头错误");
        return -1;
    }
    CString strMsg=pDlg->m_MsgSend;
    end=sockClient.Send(strMsg,strMsg.GetLength()); 
    if(end==SOCKET_ERROR)
    {
        AfxMessageBox("_SendMsgThread Send错误!"+pDlg->GetError(GetLastError()));
        return -1;
    }
    CString strLocalName;
    pDlg->GetLocalHostName(strLocalName);
    CString strLocalIP;
    pDlg->GetIpAddress(strLocalName,strLocalIP);
    pDlg->AddMsgList(strLocalIP+"->"+strLocalName,strMsg);
    
    int i=0;
    sockClient.Close();
    return 0;
}

------解决方案--------------------
初始化socket
wsastartup(xxx)
------解决方案--------------------
启动Winsock服务WSAStartup()
格式：int WSAStartup(WORD wVersionRequested,LPWSADATA lpWASData);
功能：此函数是对Windows Sockets DLL进行初始化，只有此函数调用成功后才可以调用其他Windows Sockets DLL的函数。
------解决方案--------------------
估计是没加载套接字库

WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD( 2, 2 );

err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
return;
}

/* Confirm that the WinSock DLL supports 2.2.*/
/* Note that if the DLL supports versions greater */
/* than 2.2 in addition to 2.2, it will still return */
/* 2.2 in wVersion since that is the version we */
/* requested. */

if ( LOBYTE( wsaData.wVersion ) != 2 ||
HIBYTE( wsaData.wVersion ) != 2 ) {
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
WSACleanup( );
return;
}

/* The WinSock DLL is acceptable. Proceed. */

Declared in Winsock2.h.

------解决方案--------------------

探讨
这个是发送消息线程，但是有错，我调试了，每次执行到sockClient.Create();就出错，但是我不知道这句话错在哪里了，求指点

C/C++ code
/////TCP发送信息线程//////////
UINT _SendMsgThread(LPVOID lparam)
{
//
CTestDlg *pDlg=(CTestDlg *)lparam;
/……

------解决方案--------------------
WSAGetLastError()

有个关于网络编程的异常，麻烦帮小弟看看

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