private void btnAddConfirm_Click(object sender, EventArgs e)
{
frontpage.VehicleIcon();
Car car = new Car(txtBoxTag.Text,
cmbBxVehType.Text,
cmbBxVehModel.Text,
frontpage.lblDigitalClock.Text,
frontpage.TimeControl("Seconds"),
frontpage.TimeControl("CostSeconds"));
carList.Add(car);
this.Close();
frontpage.Display();
}