void StopMark()
 {
     if (thisMarkProcess != null && thisMarkProcess.IsRunning())
     {
         thisMarkProcess.Stop();
     }
     thisMarkProcess = null;
 }
 void StartMark()
 {
     StopMark();
     thisMarkProcess = thisProcessFactory.CreateMarkerUIMarkProcess(
         this
         );
     thisMarkProcess.Run();
 }