Haven't looked at WolRon's stuff, but from what I know, copyright occurs the moment you create your work. To formally file for it, governments in the Western Hemisphere have copyright offices, and a work can be recorded for a usually small fee (I think it was $10 in the USA). It's so inexpensive, that if you are serious about protecting your work (and why not--it's yours, and you don't want anybody stealing it, right?), then go for it.