//method to change the rotors that are used
public void ChangeRotors(string rot1,string rotName1,char rotNotch1,
string rot2,string rotName2,char rotNotch2,
string rot3,string rotName3,char rotNotch3)
{
lblRotorS.Text = rotName1;
lblRotorM.Text = rotName2;
lblRotorD.Text = rotName3;
rr = null;
rm = null;
rl = null;
rr = new Rotor(rot3,lblRotor1,rotNotch3);
rm = new Rotor(rot2,lblRotor2,rotNotch2);
rl = new Rotor(rot1,lblRotor3,rotNotch1);
rr.ResetOffset();
rm.ResetOffset();
rl.ResetOffset();
rr.SetNextRotor(rm);
rm.SetNextRotor(rl);
rl.SetNextRotor(reflector);
rm.SetPreviousRotor(rr);
rl.SetPreviousRotor(rm);
reflector.SetPreviousRotor(rl);
lblRotor1.Text = "A";
lblRotor2.Text = "A";
lblRotor3.Text = "A";
}