rem: extern "C" Decorator *instantiate_decorator(BRect rect, int32 wlook, int32 wfeel, int32 wflags)
add: extern "C" Decorator *instantiate_decorator(BRect rect, const char *title, int32 wlook, int32 wfeel, int32 wflags,DisplayDriver *ddriver)
context: extern "C" Decorator *instantiate_decorator(BRect rect, int32 wlook, int32 wfeel, int32 wflags){	return new BeDecorator(rect,wlook,wfeel,wflags);}