Register a page, how to?

Hi

In my plugin I want to use a page like this “?page=edit-quiz” but I dont want it to show up in the admin menu.

I understand that I need to register all pages, but how can I do that not using the add_submenu_page()? (that put the page in the menu)

If I try “$_registered_pages[“edit-quiz”] = true;” I cant set the page permission.

So. is there a function like “add_page” that I cant find or how am I supposed to do this?

Thanks for any help // Johannes