static void ctrl_Loaded(object sender, RoutedEventArgs e)
        {
            if (sender == null || sender.GetType() != typeof(System.Windows.Controls.Ribbon.Ribbon))
            {
                return;
            }

            System.Windows.Controls.Ribbon.Ribbon _ribbon = (System.Windows.Controls.Ribbon.Ribbon)sender;

            var tabGrid = _ribbon.GetDescendants <Grid>().FirstOrDefault();

            tabGrid.RowDefinitions[1].Height = new GridLength(0, System.Windows.GridUnitType.Pixel);


            foreach (Line line in _ribbon.GetDescendants <Line>())
            {
                line.Visibility = Visibility.Collapsed;
            }
        }