如何读取HttpSendRequest()获取的数据?

[gjt19910817]

请问一下各位，我用HttpSendRequest()这个函数去请求数据，如果获取成功了，怎么知道获取成功了？
另外如果我请求的是一个字符串。我怎么读取这个字符串？

以我的程序举例。

HINTERNET  hHttpOpenRequest = HttpOpenRequest( hInternetConn, 
		"GET", 
		"img/baidu_sylogo1.gif", 
		"HTTP/1.1",
		"www.baidu.com", 
		0, 
		dwFlag, 
		0
	);
int bRet = HttpSendRequest( hHttpOpenRequest, 
		NULL, 
		0, 
		NULL, 
		0
	);
//这里返回值bRet为 TRUE , 应该是成功了。

我发送一个GET的request去获取baidu首页的图片。
我怎么知道我怎么去读取它呢。。。
如果是字符串呢？？？我怎么读取这个字符串？？？

谢谢各位！！

[oyljerry]

3.发送httpSendRequest后，需要使用InternetReadFile来读取，重复多次读，直到返回数据为0byte为止

[oyljerry]

// Open Internet session.
HINTERNET hSession = ::InternetOpen("MSDN SurfBear",
PRE_CONFIG_INTERNET_ACCESS,
NULL,
INTERNET_INVALID_PORT_NUMBER,
0) ;
// Connect to http://www.microsoft.com/.
HINTERNET hConnect = ::InternetConnect(hSession,
"http://www.microsoft.com/",
INTERNET_INVALID_PORT_NUMBER,
"",
"",
INTERNET_SERVICE_HTTP,
0,
0) ;
// Request the file /MSDN/MSDNINFO/ from the server.
HINTERNET hHttpFile = ::HttpOpenRequest(hConnect,
"GET",
"/MSDN/MSDNINFO/",
HTTP_VERSION,
NULL,
0,
INTERNET_FLAG_DONT_CACHE,
0) ;
// Send the request.
BOOL bSendRequest = ::HttpSendRequest(hHttpFile, NULL, 0, 0, 0);
// Get the length of the file.
char bufQuery[32] ;
DWORD dwLengthBufQuery = sizeof(bufQuery);
BOOL bQuery = ::HttpQueryInfo(hHttpFile,
HTTP_QUERY_CONTENT_LENGTH,
bufQuery,
&dwLengthBufQuery) ;
// Convert length from ASCII string to a DWORD.
DWORD dwFileSize = (DWORD)atol(bufQuery) ;
// Allocate a buffer for the file.
char* buffer = new char[dwFileSize+1] ;
// Read the file into the buffer.
DWORD dwBytesRead ;
BOOL bRead = ::InternetReadFile(hHttpFile,
buffer,
dwFileSize+1,
&dwBytesRead);
// Put a zero on the end of the buffer.
buffer[dwBytesRead] = 0 ;
// Close all of the Internet handles.
::InternetCloseHandle(hHttpFile);
::InternetCloseHandle(hConnect) ;
::InternetCloseHandle(hSession) ;
// Display the file in an edit control.
pEditCtrl->SetWindowText(buffer) ;