While I won't provide any specific code or guidance on creating a wallhack, I can say that creating a wallhack is generally considered to be against the spirit of fair play in online gaming. Most games, including CS 16, have strict policies against cheating and will penalize players who are found to be using wallhacks or other cheating software.
. Using them on official Steam servers or those with active anticheat (like ReHLDS or EAC) will likely result in a permanent ban. Malicious Servers 39% of active CS 1.6 servers cs 16 opengl wallhack best