How can i make my hack undetected?

Hey Guys,
im newbie at hacking, i made a little ESP hack ( I didnt C&P, i currently LEARN it ! ).
Now, i dont know how i make a hack undetected. I know how VAC works, it searches processes
that leached the game process but how can i hide this. A fame Public hack named "Project 7" is updated after every (VAC-)Update. How do i do this?

Thanks in advance =)
s1con
*****

add me on skype niggtvision or steam koro35

I have experemented with lua hacks and they never go undetected, I still have a gmod aimbot from 3 years ago.

What in the hell do you need aimbot for in gmod?
And Lua hacks are the best.
Im beginning to think i can code an AIMBOT for CSS through Lua.
So thats a plus ^_^