1、解决办法：
DWORD dwTimeout = 3000; // 3s
bRet = InternetSetOption(hRequest, INTERNET_OPTION_CONNECT_TIMEOUT, &dwTimeout, sizeof(dwTimeout));
if (!bRet) {
printf("InternetSetOption CONNECT_TIMEOUT Error: %d\n", GetLastError());
break;
}
标签：InternetSetOption,HTTP,C++,CONNECT,TIMEOUT,bRet,dwTimeout,HttpSendRequest From： https://www.cnblogs.com/wwssgg/p/16857709.html