/// <summary> /// show the form vehicleStock /// </summary> /// <param name="sender">object</param> /// <param name="e">EventArgs</param> private void vehicleStockToolStripMenuItem_Click(object sender, EventArgs e) { if (vehicleStockForm == null) { vehicleStockForm = new frmVehicleStock(); vehicleStockForm.MdiParent = this; vehicleStockForm.Show(); vehicleStockForm.FormClosed += new FormClosedEventHandler(vehicleStockForm_FormClosed); } else { vehicleStockForm.Focus(); } }
void vehicleStockForm_FormClosed(object sender, FormClosedEventArgs e) { vehicleStockForm = null; }