public static extern bool PlayM4_SetEncTypeChangeCallBack(int nPort, FUNENCCHANGE funEncChange, int nUser);
public static extern bool PlayM4_SetEncTypeChangeCallBack(int nPort, FUNENCCHANGE funEncChange, int nUser);
public static extern bool PlayM4_SetEncTypeChangeCallBack(int nPort, FUNENCCHANGE funEncChange, int nUser);
public static extern bool PlayM4_SetEncTypeChangeCallBack(int nPort, FUNENCCHANGE funEncChange, int nUser);