Developers stubbornly refusing to utilize the tools provided by the operating system because they think they can do it better (90% of the time they can't) is one of my greatest pet peeves.
You should ONLY ever use your own engine for things like notifications if the particular OS doesn't support them (pre-10 Windows)
You should ONLY ever use your own engine for things like notifications if the particular OS doesn't support them (pre-10 Windows)