struct IKinectInputAudioListener {
  enum eGrammaChange {
    eGC_Enabled = 0,
    eGC_Disabled,
    eGC_NotLoaded
  };
};

IInput.h

enum eGrammaChange {
  eGC_Enabled = 0,
  eGC_Disabled,
  eGC_NotLoaded
};

IInput.h

virtual ~IKinectInputAudioListener();

virtual void OnGrammarChange(const char * grammarName, eGrammaChange change) = 0;

virtual void OnVoiceCommand(const char * voiceCommand) = 0;