@Crusader12 – sorry, my long post was hard to understand. Can I submit a plugin to a current windows app I have on the marketplace?
Been following this thread myself, and a curious post appeared today which is related. You should be able to do what your asking as others seem to be doing it :http://codecanyon.net/forums/thread/dependent-items/87271?page=1#732017
so if I understood correctly, you’ll be submitting your item in the add-ons category for .NET