public override Version GetVersionPresent(object feature)
        {
            if (feature == DesktopComposition)
            {
                if (OnVista)
                {
                    using (var dwmapi = NativeModule.TryLoad("dwmapi.dll"))
                    {
                        if (dwmapi != null)
                        {
                            if (dwmapi.ContainsProcedure("DwmIsCompositionEnabled"))
                            {
                                return(new Version(0, 0, 0, 0));
                            }
                        }
                    }
                }
            }

            if (feature == DropShadow)
            {
                if (OnXP)
                {
                    return(new Version(0, 0, 0, 0));
                }
            }

            return(base.GetVersionPresent(feature));
        }