How do I make a button configuration in game?

I was wondering if it is possible to make a way for players to change their buttons and possibly movement in the game like in most options in games where you can change your buttons.

Thanks for the link. I didn't really understand how to change the buttons properly from their posts. But I did manage to make something that works here. -https://www.dropbox.com/s/cui2t8gwhsh4vjr/charCode_Example%2Bchange_button.capx-

Is their an easier way to do it then what I did?