[1.11.2] GUI help

[Frost2779]

Can anyone point me in the direction to a up to date tutorial on GUIs that open when you right click and item? I haven't had much luck finding any

[Daeruin]

Let me know if you find any. I'd like to do this, as well. I tried once and couldn't get it to work. The mod Terrafirmacraft does this with containers. Perhaps you can make more sense of their code than I could.