Okay, I know this is probably pretty basic, but I can' find a tutorial anywhere. How does one go about creating a block with a gui, like a furnace? Thanks!

Wow, thanks. I said I can't find any tutorials, and you tell me to look for tutorials? That helped a whole lot. No, the ones on the wiki are all outdated, and google yields no results.

At the very top of the page it says "In some cases the information might still apply but in most cases you will run into problems."