private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
 {
     if ((int)e.KeyChar == (int)Keys.Enter)
     {
         TXTGUIA.Focus();
     }
 }
 void LIMPIAR()
 {
     TXTFACTURA.Clear();
     TXTGUIA.Clear();
     CMBTRANSPORTISTA.SelectedIndex = 0;
     comboBox1.SelectedIndex        = 0;
     TXTMOTIVO.Clear();
     TRAER_NUMERO_GUIA();
     DGVDATA.Rows.Clear();
 }
 private void button2_Click(object sender, EventArgs e)
 {
     DGVDATA.Rows.Clear();
     TXTCAN.Clear();
     TXTFACTURA.Clear();
     TXTGUIA.Clear();
     TXTLOTE.Clear();
     TXTMOTIVO.Clear();
     TXTPROD.Clear();
     textBox2.Clear();
 }