install code location

i'm not find location for installing code. where can i install the code, using the code, adding the code? Is there different of code location between phbpbb2, phpbb3, invision,etc?

hi ! what code you want to install in your forum ? you have phbb2 or punbb forum version ?

when you mean code you mean this??????

Code:

[code][/code]

i cant understand what you are trying to say