开头用的是openurl  internetreadfile  但是速度 太慢了

这是 httqueryinfo  不知道为什么获取不到

看了半天不知道啥子问题， 哪位大牛给看看啥子问题， 另外如果有更好的方法获取页面字节数也给小弟告知下。
 HINTERNET hSession = InternetOpen(_T("UrlTest"),PRE_CONFIG_INTERNET_ACCESS, NULL, INTERNET_INVALID_PORT_NUMBER, 0); //初始化网络
     if(hSession != NULL)
     {
       CString cs1("");
       CString cs2("");
       CString ss("www.baidu.com");
       HINTERNET ThConnect=InternetConnect(hSession,ss,INTERNET_INVALID_PORT_NUMBER,cs1,cs2,INTERNET_SERVICE_HTTP,0,0);//建立会话链接
       if(ThConnect!=NULL)
       {
         CString requeststyle("GET");
         CString sx("");
         HINTERNET ThHttpFile=HttpOpenRequest(ThConnect,requeststyle,sx,HTTP_VERSION,NULL,0,INTERNET_FLAG_DONT_CACHE,0);
         if(ThHttpFile!=NULL)
         {
           BOOL bSendRequest=HttpSendRequest(ThHttpFile,NULL,0,0,0);
               int number=0;
             while(bSendRequest==NULL)
             {   
               bSendRequest=HttpSendRequest(ThHttpFile,NULL,0,0,0);
               if(number==10)
               {
                 break;
               }
             }
             char bufQuery[32];
             DWORD dwLengthBufQuery=sizeof(bufQuery);
             if(bSendRequest==TRUE)
             {
             BOOL bQuery=HttpQueryInfo(ThHttpFile,HTTP_QUERY_CONTENT_LENGTH,bufQuery,&dwLengthBufQuery,0);

             DWORD dwFileSize=(DWORD)atol(bufQuery);  //将字符串转换成长整形

             char *buffer=new char[dwFileSize+1];
             DWORD dwBytesRead;
             BOOL bRead=InternetReadFile(ThHttpFile,buffer,dwFileSize+1,&dwBytesRead);
             buffer[dwBytesRead]=0;
             CString sm;
             sm.Format(_T("%ld"),dwBytesRead);
             MessageBox(sm);

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