private void TimerTipoPago_Tick(object sender, EventArgs e)
 {
     if (isCollapseTP)
     {
         PanelFormaPago.Height -= 10;
         if (PanelFormaPago.Size == PanelFormaPago.MinimumSize)
         {
             TimerTipoPago.Stop();
             isCollapseTP = false;
         }
     }
     else
     {
         PanelFormaPago.Height += 10;
         if (PanelFormaPago.Size == PanelFormaPago.MaximumSize)
         {
             TimerTipoPago.Stop();
             isCollapseTP = true;
         }
     }
 }
 private void BtnCheque_Click(object sender, EventArgs e)
 {
     tipoPago = 3;
     button4.Text = "Cheque";
     TimerTipoPago.Start();
 }
 private void BtnCredito_Click(object sender, EventArgs e)
 {
     tipoPago = 2;
     button4.Text = "Credito";
     TimerTipoPago.Start();
 }
 private void BtnContado_Click(object sender, EventArgs e)
 {
     tipoPago = 1;
     button4.Text = "Contado";
     TimerTipoPago.Start();
 }
 private void BtnFormaDePago_Click(object sender, EventArgs e)
 {
     TimerTipoPago.Start();
 }