image compression quality

Question

how do I adjust the jpeg image compression quality using the BitMap Save method?
I have a C# code fragment --- but cant seem to get it to work in C++

private void SaveJPGWithCompressionSetting( Image image, string szFileName, long lCompression )
{
    EncoderParameters eps = new EncoderParameters(1);
    eps.Param[0] = new EncoderParameter( Encoder.Quality, lCompression );
    ImageCodecInfo ici = GetEncoderInfo("image/jpeg");
    image.Save( szFileName, ici, eps );
}