private void btnAdd_Click(object sender, EventArgs e)
 {
     AddColumn dlg = new AddColumn(_selList, Settings);
     if (DialogResult.OK == dlg.ShowDialog(this))
     {
         UpdateColInfo();
         UpdateColButtons();
     }
 }
        private void btnAdd_Click(object sender, EventArgs e)
        {
            AddColumn dlg = new AddColumn(_selList, Settings);

            if (DialogResult.OK == dlg.ShowDialog(this))
            {
                UpdateColInfo();
                UpdateColButtons();
            }
        }