private void btnScrollToGroup_Click(object sender, EventArgs e)
        {
            ExplorerBarNavBarViewInfo view = GetExplorerNavBarView(navBarControl1);
            NavBarGroup group3             = navBarControl1.Groups[3];

            view.TopY += view.GetGroupInfo(group3).Bounds.Top - view.UpButtonBounds.Bottom;
        }
        private void btnScrollDown_Click(object sender, EventArgs e)
        {
            ExplorerBarNavBarViewInfo view = GetExplorerNavBarView(navBarControl1);

            view.TopY += ScrollStep;
        }