Cheat Engine and Trainer Idea

[Bull3t]

I have a Trainer that I downloaded for WarRock and it works brilliantly, I was just wondering if I turned on the unlimited ammo hack, and ran a scan on Cheat Engine for an "Unchanged Value" whether it would show me the byte that the trainer is keeping the same and then show me what byte the Ammo is stored in? Or would it not work?

Also if you were to try this what would you do the First Scan with and what would you do as the Value Type?