C / C++ / MFC

BOOL GetWebContent(LPCTSTR szURL, CString &strData)
{
	strData = "";

	HINTERNET hConnection = InternetOpen("Microsoft Internet Explorer",
		                                 PRE_CONFIG_INTERNET_ACCESS,
										 NULL,
										 INTERNET_INVALID_PORT_NUMBER,
										 0);

	if (hConnection == NULL)
		return FALSE;

    DWORD dwSize;
    CHAR szHead[] = "Accept: */*\r\n\r\n";
    char *szbuf;
    HINTERNET hConnect;
	
	if (!(hConnect = InternetOpenUrl(hConnection, 
									 szURL, 
									 szHead,
									 lstrlen(szHead), 
									 INTERNET_FLAG_DONT_CACHE, 
									 0)))
    {
		InternetCloseHandle(hConnection);
        return FALSE;
    }       
	
	BOOL bReadInParts = FALSE;
	DWORD dwNumberOfBytes = 0;
	// Query the size of http file
	if (InternetQueryDataAvailable(hConnect,
		                           &dwNumberOfBytes,
								   0,
								   0)){
		if (dwNumberOfBytes < 0){
			bReadInParts = TRUE;
		}
		else{
			szbuf = new char[dwNumberOfBytes+1];
		    if (!InternetReadFile(hConnect, szbuf, dwNumberOfBytes, &dwSize)){
				bReadInParts = TRUE;
			}
			if (dwSize < dwNumberOfBytes+1)
				szbuf[dwSize] = '\0';

			strData = szbuf;
			delete []szbuf;
		}
	}
	
	if (bReadInParts){
		// Read the file in parts
		szbuf = new char[512];
        do{
			if (!InternetReadFile (hConnect, szbuf, 512,  &dwSize)){
				return FALSE;
			}

			if (!dwSize)
				break;  // Condition of dwSize=0 indicate EOF. Stop.

			if (dwSize < 512)
				szbuf[dwSize] = '\0';

			strData += szbuf;

		} while(1);
		delete []szbuf;
	}

	InternetCloseHandle(hConnect);
	InternetCloseHandle(hConnection);
	return TRUE;
}