private void Box_PPEI_VIN_Digits_12_TextChanged(object sender, EventArgs e)
 {
     if (Box_PPEI_VIN_Digits_12.Text.Length >= 2)
     {
         Box_PPEI_VIN_Digits_13.Focus();
     }
 }
 private void Box_PPEI_VIN_Digits_13_Click(object sender, EventArgs e)
 {
     Box_PPEI_VIN_Digits_13.Focus();
     Box_PPEI_VIN_Digits_13.SelectAll();
 }
 private void Box_PPEI_VIN_Digits_13_Enter(object sender, EventArgs e)
 {
     Box_PPEI_VIN_Digits_13.SelectAll();
 }