获取外网IP最简单的方法

std::string getOutIpaddress()

{

std::string strRet = "";

HRESULT hr = URLDownloadToFile(NULL,"http://www.3322.org/dyndns/getip","ip2city.dat",0,NULL);

if (hr != S_OK)

{

return strRet;

}

char szBuffer[1024] = {0};

memset(szBuffer,0,1024);

FILE* fp = fopen("ip2city.dat","r");

if (fp == NULL)

{

DeleteFile("ip2city.dat");

return strRet;

}

fscanf(fp,"%s",szBuffer);

fclose(fp);

DeleteFile("ip2city.dat");

strRet = szBuffer;

return strRet;

}