public static extern bool PlayM4_SetAudioCallBack(int nPort, FUNAUDIO funAudio, int nUser);
public static extern bool PlayM4_SetAudioCallBack(int nPort, FUNAUDIO funAudio, int nUser);
public static extern bool PlayM4_SetAudioCallBack(int nPort, FUNAUDIO funAudio, int nUser);
public static extern bool PlayM4_SetAudioCallBack(int nPort, FUNAUDIO funAudio, int nUser);