private void btnRun_Click(object sender, EventArgs e)
        {
            m_grid.DataRows.Clear();
            if (string.IsNullOrEmpty(txtQuery.Text))
            {
                return;
            }
            var list = ADUtils.FindInAdInfos(txtQuery.Text);

            foreach (var i in list)
            {
                var row = m_grid.DataRows.AddNew();
                row.Cells[0].Value = i.Item1;
                row.Cells[1].Value = i.Item2;
                row.Cells[2].Value = i.Item3;
            }
        }