程序代码：

void CCaptrueDlg::OnButton1()
{
    // TODO: Add your control notification handler code here
    WSADATA wsadata;
    if(0!=WSAStartup(MAKEWORD(2,2),&wsadata))
    {
        CString str;
        str.Format("WSAStartUp初始化失败,错误代码：%d",GetLastError());
        MessageBox(str);
        return;
    }
    SOCKET Socket;
    Socket=socket(AF_INET,SOCK_RAW,IPPROTO_IP);
    if(INVALID_SOCKET==Socket)
    {
        CString str;
        str.Format("Socket创建失败,错误代码：%d",GetLastError());
        MessageBox(str);        WSACleanup();
        return;
    }
    int RecvTime=5000;
    if(setsockopt(Socket,SOL_SOCKET,SO_RCVTIMEO,(CHAR *)&RecvTime,
        sizeof(RecvTime))!=0)
        {
        CString str;
        str.Format("设置Socket选项失败,错误代码：%d",GetLastError());
        MessageBox(str);        closesocket(Socket);
        WSACleanup();
        return;
    }

    char HostName[128]={0};
    if(gethostname(HostName,128)!=0)
    {
        CString str;
        str.Format("获得主机名失败,错误代码：%d",GetLastError());
        MessageBox(str);        closesocket(Socket);
        WSACleanup();
        return;
    }

    hostent *phost=NULL;
    phost=gethostbyname(HostName);
    if(phost==NULL)
    {
        CString str;
        str.Format("获取主机地址失败,错误代码：%d",GetLastError());
        MessageBox(str);        closesocket(Socket);
        WSACleanup();
        return;
    }

    sockaddr_in HostAddr;
    memset(&HostAddr,0,sizeof(HostAddr));
    HostAddr.sin_family=AF_INET;
    HostAddr.sin_port=htons(7000);
    HostAddr.sin_addr.S_un.S_addr=(*(in_addr *)phost->h_addr_list).S_un.S_addr;
    if(bind(Socket,(sockaddr*)&HostAddr,sizeof(HostName))!=0)
    {
        CString str;
        str.Format("绑定Socket失败,错误代码：%d",GetLastError());
        MessageBox(str);
        closesocket(Socket);
        WSACleanup();
        return;
    }

    UpdateData();