Skimming through the Scripting part of the wiki I have understood that Messagebox are an in-built feature of Papyrus,
but I'd like to understand if anyone has understood if and whether Textboxes are also an option.

My guess would be "Yes", because the naming window at character creation is definitely a textbox...but if they are available, how they work??
Jashkar

I'm sure it's a function, I'm still looking but have yet to find it on the wiki.