Windows程式設計 讀書筆記 – 領略INTERNET

來源:互聯網
上載者:User

一、WinSock

  WSAStartup (MAKEWORD(2,0), &WSAData);

    //之後執行失敗的都要WSACleanup();

  sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP) ;

  WSAAsyncSelect (sock, hwnd, WM_SOCKET_NOTIFY,  FD_CONNECT | FD_READ);

    //設定connect為非阻塞。

    //在FD_CONNECT | FD_READ訊息發生時,觸發WM_SOCKET_NOTIFY訊息

  connect(sock, (SOCKADDR *) &sa, sizeof (sa)) ;

 

 

  WM_SOCKET_NOTIFY訊息處理:

    wEvent = WSAGETSELECTEVENT (lParam) ;   // ie, LOWORD
        wError = WSAGETSELECTERROR (lParam) ;   // ie, HIWORD

    switch(wEvent)

    {

    case FD_CONNECT:recv (sock, (char *) &ulTime, 4, MSG_PEEK) ;

    case FD_READ:recv (sock, (char *) &ulTime, 4, 0) ;

     }

  處理完畢後,清理:

  closesocket (sock) ;
    sock = 0 ;
    WSACleanup () ;

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