Most trainers play a "ding" or say "Trainer Activated" once the game is detected. If you don't hear a sound, the trainer is not attached.
If you browse popular modding sites like Cheat Happens, GameCopyWorld, or WeMod, you will find that trainers for this title usually share a standard set of functions. These are typically toggled on and off using hotkeys (like F1, F2, etc.). hawx 2 trainer
Most trainers for this game offer a combination of the following toggles (usually mapped to the numpad keys): Most trainers play a "ding" or say "Trainer
Even with a good trainer, HAWX 2 can be stubborn. Here are the fixes for common problems. hawx 2 trainer