WinSock2网络编程的步骤（服务器端）

 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
 m_hSocket = NULL;
 isServerStart=FALSE;
 ChatEnable=FALSE;

 WSADATA wsaData;//结构体，包含加载库版本的相关信息
 WORD version = MAKEWORD(2, 0);//版本号
 int ret = WSAStartup(version, &wsaData);//返回0表示初始化成功
 if(ret != 0)
  TRACE("Initilize Error!\n");

//AF_INET表示在Internet域进行通信，SOCK_STREAM表示套接字类型（区别于SOCK_DGRAM），0表示TCP/IP协议
m_hSocket = socket(AF_INET, SOCK_STREAM,0);
  if (m_hSocket==INVALID_SOCKET)
  {
   AfxMessageBox("Socket Create Error!");
   return;
  }

m_addr.sin_family = AF_INET;//Internet域
m_addr.sin_addr.S_un.S_addr = INADDR_ANY;//任意地址
m_addr.sin_port = htons(1029);//端口号
int ret = 0;
int error = 0;
ret = bind(m_hSocket, (LPSOCKADDR)&m_addr, sizeof(m_addr));//绑定
error = WSAGetLastError();
if(ret == SOCKET_ERROR)
{
    list->AddString("服务器：Bind Error!");
    return ;
}

DWORD dwthread;//unsigned long类型
::CreateThread(NULL,0,listenthread,(LPVOID)m_hSocket,0,&dwthread);//listenthread是一个监听该线程的函数，(LPVOID)m_hSocket是套接字的指针

 DWORD WINAPI listenthread(LPVOID lpparam)//将数据从一个线程传到另一个线程的唯一方法是在创建线程时传递给新线程一个指针参数LPVOID lpparam
{    
    SOCKET m_socket=(SOCKET)lpparam;//获取传递进来的套接字句柄

    int ret;
    ret=listen(m_socket,30);
    if(ret==SOCKET_ERROR)
    {
        ListInfo=_T("Listen Error!");
        return 0;
    }

    SOCKET s;
    s=accept(m_socket,NULL,NULL);
    DWORD dwthread;
    ::CreateThread(NULL,0,Recvthread,(LPVOID)s,0,&dwthread);    
    ::CreateThread(NULL,0,Sendthread,(LPVOID)s,0,&dwthread);
    return 0;

}

//消息接收Recvthread

while(1)

{
    ret=recv(m_socket,buff,256,0);
    if(ret==SOCKET_ERROR)
    {
        ListInfo=_T("Socket Receive Error!");
        closesocket (m_socket);
    }
    buff[ret]=‘\0‘;
    CString str;
    str="客户端:";
    str=str+buff;
    ListInfo=str;
}

//消息发送Sendthread

while(1)
{
    if (ChatInfo.GetLength()>0)
    {
    ret=send(m_socket,ChatInfo,ChatInfo.GetLength(),0);
    if(ret==SOCKET_ERROR)
    {
        ListInfo=_T("服务器:Data send error!");
        return -1;
    }
    ListInfo=_T("服务器：");
    ListInfo+=ChatInfo;
    ChatInfo.Empty();    
}