private void Box_Network_Digits_0_TextChanged(object sender, EventArgs e)
 {
     if (Box_Network_Digits_0.Text.Length >= 2)
     {
         Box_Network_Digits_1.Focus();
     }
 }
 private void Box_Network_Digits_1_Click(object sender, EventArgs e)
 {
     Box_Network_Digits_1.Focus();
     Box_Network_Digits_1.SelectAll();
 }
 private void Box_Network_Digits_1_Enter(object sender, EventArgs e)
 {
     Box_Network_Digits_1.SelectAll();
 }