void showAlertViewMenuItem_Click(object sender, System.EventArgs e) { if (alertDlg == null) { alertDlg = new AlertDlg(); alertDlg.alertControl1.SelectedStockChanged += OnSelectedStockAndDurationChanged; alertDlg.Disposed += alertDlg_Disposed; alertDlg.Show(); } else { alertDlg.Activate(); } }