/// <summary> /// When execute clicked /// </summary> /// <param name="sender">sender</param> /// <param name="e">arg</param> private void executeItem_Click(object sender, EventArgs e) { Control c = sender as Control; if (this.exec) { this.txtSource.Text = po.Execute(); this.exec = false; this.executeItem.Text = "Source"; } else { this.txtSource.Text = po.ToString(); this.exec = true; this.executeItem.Text = "Execute"; } }