Trainer Patching

How the hell are trainers patched so they are detected? I know it cant be by file name because if u change name to system process then it could make your computer unstable so how?

i use to mod halo land isn't there a program tht patches files
i forgot wat it's called but there is one
i'll tell u the name as soon as i find it

kk

Mostley, They detect it by name,

Or, They decode the trainer, Look at it's coding, and detect the coding,