Play fair. Respect the legacy. Don't download random DLLs.
The simple wallhack works by manipulating the game's rendering engine, which is responsible for drawing the game's visuals. When a player uses a wallhack, the cheat injects code into the game's memory, altering the way the game renders walls and other solid objects. Counter Strike 1.6 Simple Wallhack
Counter-Strike 1.6 Simple Wallhack: Understanding the Classic Cheat Play fair