Question on script injectors...

Alright, so basically I have a lua script that contains some cheats/hacks on it, and I have this injector. What I was wondering about injectors, is do they have a .dll that is automatically used to modify your garry's mod? Can I get VAC banned for using an injector on a plain old lua file? I really want to know before I happen to use it. The lua has no .dll with it, but do injectors usually inject one into the game? I'm not sure how injectors work really.

You inject a bypass into Garry's mod then run the lua file in game.
Find a bypass on mpgh so you can run client side lua on servers then when your in game run that lua file you got by typing lua_openscript_cl "shittyscript.lua" but make sure that .lua you have is in your lua folder in gmod directory

And no you're not going to get vac banned for anything