private void ActOK_Click(System.Object sender, System.EventArgs e)
        {
            // ----- The region name is required.
            if (RegionName.Text.Trim().Length == 0)
            {
                MessageBox.Show("Please provide a region name.");
                RegionName.Focus();
                return;
            }

            // ----- Success.
            this.DialogResult = DialogResult.OK;
        }