SeasideResearch.LibCurlNet.Easy.ProgressDelegate C# (CSharp) Method

        private static int ProgressDelegate(IntPtr parm, double dlTotal,
            double dlNow, double ulTotal, double ulNow)
        {
            GCHandle gch = (GCHandle)parm;
            Easy easy = (Easy)gch.Target;
            if (easy == null)
                return 0;
            if (easy.m_pfProgress == null)
                return 0;
            int nprog = easy.m_pfProgress(easy.m_progressData, dlTotal,
                dlNow, ulTotal, ulNow);
            return nprog;
        }