C/C++ 为什么这个文件打不开呀,该怎么处理

C/C++ 为什么这个文件打不开呀
这个程序是从网上下载一个网页，然后再打开，为啥打不开呢
[code=C/C++][/code]
#include<windows.h>
#include<wininet.h>
#include<iostream>
#pragma comment(lib,"wininet.lib")
using namespace std;

int down_load(void)
{
DWORD byteread=0;
char buffer[100];

memset(buffer,0,100);
HINTERNET internetopen;
internetopen=InternetOpen(L"Testing",INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,0);
if (internetopen==NULL){
cout<<"Internet open failed!"<<endl;
return 1;
}
HINTERNET internetopenurl;
internetopenurl=InternetOpenUrl(internetopen,L"http://blog.sina.com.cn/s/articlelist_1187986757_0_1.html",NULL,0,INTERNET_FLAG_RELOAD,0);
if (internetopenurl==NULL){
cout<<"Internet open url failed!"<<endl;
InternetCloseHandle(internetopen);
}

BOOL hwrite;
DWORD written;
HANDLE createfile;
createfile=CreateFile(L"E:\\Down.html",GENERIC_WRITE,0,0,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,0);
if (createfile==INVALID_HANDLE_VALUE){
cout<<"Create File failed!"<<endl;
InternetCloseHandle(internetopenurl);
}
BOOL internetreadfile;
while(1){
internetreadfile=InternetReadFile(internetopenurl,buffer,sizeof(buffer),&byteread);
if(byteread==0)
break;
hwrite=WriteFile(createfile,buffer,sizeof(buffer),&written,NULL);
if (hwrite==0){
cout<<"Write to file failed!"<<endl;
CloseHandle(createfile);
}
}
cout<<"Finished downloading!"<<endl;
return 0;
}

void main()
{
down_load();
  FILE *fp;
fp=fopen("E:\\Down.html","rt");
if(fp==NULL) {
printf("ERROR\n");
}
}

------解决方案--------------------
getlasterror看看报什么错
------解决方案--------------------
CloseHandle(createfile); 句柄没释放

改成:
cout<<"Write to file failed!"<<endl;
}
}
CloseHandle(createfile);
cout<<"Finished downloading!"<<endl;
return 0;