noob cannon lol: You can get the code with a function and search for you expression then.
Zenith77: You could take a look at the examples and at the (very small) documentation I made for it. Although, if I were you, I wouldn't write plugins until I release the next version of amxx-studio, the api isn't very useful ^^ You can write little plugins but I doubt it's enough for a generator or something like that. The api of the next version will be much better I think.