怎样获取本机的子网掩码?

CString szMark;


    PIP_ADAPTER_INFO pAdapterInfo;

    PIP_ADAPTER_INFO pAdapter = NULL;

    DWORD dwRetVal = 0;

    pAdapterInfo = ( IP_ADAPTER_INFO * ) malloc( sizeof( IP_ADAPTER_INFO ) );

    ULONG ulOutBufLen;


    ulOutBufLen = sizeof(IP_ADAPTER_INFO);



    // 第一次调用GetAdapterInfo获取ulOutBufLen大小

    if (GetAdaptersInfo( pAdapterInfo, &ulOutBufLen) == ERROR_BUFFER_OVERFLOW)

    {

        free(pAdapterInfo);

        pAdapterInfo = (IP_ADAPTER_INFO *) malloc (ulOutBufLen);

    }



    if ((dwRetVal = GetAdaptersInfo( pAdapterInfo, &ulOutBufLen)) == NO_ERROR) {

        pAdapter = pAdapterInfo;

        while (pAdapter)

        {


            szMark.Format(_T("%s"), CA2W(pAdapter-
>IpAddressList.IpMask.String));

            pAdapter = pAdapter->Next;

        }

    }

将szMark值保存到listbox即可