Rentry Supporter Lang. Codeblock

[LPS100]

EDIT: Nevermind I'm dumb.

Howdy, I'm a little confused on how does the supported language codeblock works.

I'm trying to create a Rentry page with BBCode (a webgame I play still uses this for description formatting, unfortunately), but I don't understand how do you use the code in question. I honestly thought you'd paste the codeblock with the respective shortname, but it doesn't do much and I'm pretty sure that's not the intended way. ^^;