network change 2

network_change_by_nla_socket.cpp

void WaitForNetworkChnages()
{

    WSAQUERYSET querySet = {0};
    querySet.dwSize = sizeof(WSAQUERYSET);
    querySet.dwNameSpace = NS_NLA;

    HANDLE LookupHandle = NULL;
    WSALookupServiceBegin(&querySet, LUP_RETURN_ALL, &LookupHandle);
    DWORD BytesReturned = 0;
    WSANSPIoctl(LookupHandle, SIO_NSP_NOTIFY_CHANGE, NULL, 0, NULL, 0, &BytesReturned, NULL);
    WSALookupServiceEnd(LookupHandle);
}

void Test()
{

    WSAData data = {0};
    WSAStartup(MAKEWORD(2, 0), &data);
    int i = 0;
    while(1)
    {
        printf("BeginWait %d\n", i++);
        WaitForNetworkChnages();
        printf("EndWait\n");
    }

    WSACleanup();
}