//public simulator(int portNum, string returnValue)
 /// <summary>
 /// Constructor for Simulator
 /// </summary>
 /// <param name="portNum">The socket number you want to listen</param>
 public simulator(int portNum)
 {
     //tsListen = new ThreadForPAS(portNum, returnValue, new SimCallback(setBack));
       tsListen = new ThreadForPAS(portNum, new SimCallback(setReturnString));
 }
 //public simulator(int portNum, string returnValue)
 /// <summary>
 /// Constructor for Simulator
 /// </summary>
 /// <param name="portNum">The socket number you want to listen</param>
 public simulator(int portNum)
 {
     //tsListen = new ThreadForPAS(portNum, returnValue, new SimCallback(setBack));
     tsListen = new ThreadForPAS(portNum, new SimCallback(setReturnString));
 }