如何用C实现从一个网站上下载到他的INDEX.HTML呢

怎么用C实现从一个网站上下载到他的INDEX.HTML呢
比如百度吧，我用gethostbyname和getservbyname获得了他的主机ip和port号，但是怎么用C把他的index.html下载到本地呢，不用解析，只要index

[解决办法]

C/C++ code

#include <stdio.h>#include <windows.h>#include <wininet.h>#define MAXBLOCKSIZE 1024#pragma comment( lib, "wininet.lib" ) void download(const char *Url,const char *save_as)/*将Url指向的地址的文件下载到save_as指向的本地文件*/{    byte Temp[MAXBLOCKSIZE];    ULONG Number = 1;        FILE *stream;    HINTERNET hSession = InternetOpen("RookIE/1.0", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);    if (hSession != NULL)    {        HINTERNET handle2 = InternetOpenUrl(hSession, Url, NULL, 0, INTERNET_FLAG_DONT_CACHE, 0);        if (handle2 != NULL)        {                                    if( (stream = fopen( save_as, "wb" )) != NULL )            {                while (Number > 0)                {                    InternetReadFile(handle2, Temp, MAXBLOCKSIZE - 1, &Number);                                        fwrite(Temp, sizeof (char), Number , stream);                }                fclose( stream );            }                        InternetCloseHandle(handle2);            handle2 = NULL;        }        InternetCloseHandle(hSession);        hSession = NULL;    }}int main(int argc, char* argv[]){        download("http://blog.csdn.net/agoago_2009/","C:\\Users\\ago\\Desktop\\index.html");    return 0;}