void  get_WanIp()

{

    char Buf_File_Read[MAX_PATH] = {};

    char IP_Temp[];

    char IP_Host[];

    int Result_URLDownloadToFile = ;

    char szFilePath[MAX_PATH] = {};

    GetTempPathA(MAX_PATH,szFilePath);

    strcat(szFilePath,"IPinTheWorld.ini");

    Result_URLDownloadToFile = URLDownloadToFileA(,"http://ip.dnsexit.com/index.php",szFilePath,,NULL);

    if(Result_URLDownloadToFile != )//若URLDownloadToFile()成功，返回0

    {

        MessageBox(NULL, "网络故障，无法接入Internet，请联系网络管理员","提示",MB_ICONASTERISK);

        return ;

    }  

    FILE *fp_Download_URL_File=NULL;

    if ((fp_Download_URL_File=fopen( szFilePath,"r")) == NULL)

    {

        MessageBox(NULL, "系统故障，无法打开IP文件，请检查防火墙设置或联系管理人员","提示",MB_ICONASTERISK);

        return ;

    }  

    if ( fp_Download_URL_File != NULL )

    {

        fseek(fp_Download_URL_File, , SEEK_SET);

        fread(Buf_File_Read,,,fp_Download_URL_File);

        fclose(fp_Download_URL_File);

        DeleteFile(szFilePath);

    }

    strcpy(g_szWanIp,Buf_File_Read);

}