void CtdlRegisterXmsgHook(int (*fcn_ptr)(char *, char *, char *, char *), int order);
void CtdlUnregisterXmsgHook(int (*fcn_ptr)(char *, char *, char *, char *), int order);
void CtdlRegisterXmsgHook(int (*fcn_ptr)(char *, char *, char *, char *), int order);
void CtdlUnregisterXmsgHook(int (*fcn_ptr)(char *, char *, char *, char *), int order);