void CtdlRegisterUserHook(void (*fcn_ptr)(struct ctdluser *), int EventType);
void CtdlUnregisterUserHook(void (*fcn_ptr)(struct ctdluser *), int EventType);
void CtdlRegisterUserHook(void (*fcn_ptr)(struct ctdluser *), int EventType);
void CtdlUnregisterUserHook(void (*fcn_ptr)(struct ctdluser *), int EventType);