C InternetGetConnectedState 循环

Question

我想等到互联网到来，所以我用 InternetGetConnectedState 函数创建了一个循环。我在互联网被禁用时启动了程序。然后我启用互联网。但它仍然不存在。我该怎么办？

    LPWORD bur;
int abc;
    abc = InternetGetConnectedState(bur,0);
    while (abc==0){
    printf ("zzz");
    if (abc==1)
    break;
    }

Answer 1

尝试将调用放入循环中，abc 永远不会改变。

此外，您不应该将结果分配给 abc...而且，它是一个 DWORD...

DWORD abc = 0;
printf ("Waiting for an internet connection.");
 while ((abc & 0x40)){
    InternetGetConnectedState(&abc,0);
    printf (".");
}

然后将它与 1 或 0 进行比较并不会真正告诉你任何信息，看看它可以返回的标志:-

INTERNET_CONNECTION_CONFIGURED
0x40
Local system has a valid connection to the Internet, but it might or might not be currently connected.
INTERNET_CONNECTION_LAN
0x02
Local system uses a local area network to connect to the Internet.
INTERNET_CONNECTION_MODEM
0x01
Local system uses a modem to connect to the Internet.
INTERNET_CONNECTION_MODEM_BUSY
0x08
No longer used.
INTERNET_CONNECTION_OFFLINE
0x20
Local system is in offline mode.
INTERNET_CONNECTION_PROXY
0x04
Local system uses a proxy server to connect to the Internet.
INTERNET_RAS_INSTALLED
0x10
Local system has RAS instal