Shoutbox

Its not that easy, i think they meant, you need to KNOW HOW to CODE.

Its not accualtty a number code or like a password, what they meant by code is programming. To code is a verb which means to program. Go on wikipedia and type in programming or coding. I  dont know much about it, but i can just tell you what it is.
Its bassically a computer launguge. And there are many types of computer launguges. For msgplus scripts, i believe javascript is used.

Edit: Damn, you guys beat me while i was typing.