var propinf = typeof (BarItemLink).GetProperty("LinkViewInfo",
                BindingFlags.NonPublic | BindingFlags.Instance);
            var val = propinf.GetValue(barButtonItem6.Links[0], new object[] { }) as BarButtonLinkViewInfo;
            if (val.BarControl is QuickCustomizationBarControl) {
                MessageBox.Show("Hidden");
            }