Pointshop Codes?

So, basically I run a server and it runs the gamemode TTT, and I have pointshop, is there a way that I can make a little box that says like redeem code, or something like that, so that if they get a code, they can enter it and get pointshop points?

why use codes when you can just give players items with the existing shop interface lol

http://coderhire.com/scripts/view/199 like this?

or ask me I can help you to