It's quite odd that there isn't a tutorial for textboxes isn't it?
Yeah, I'd look at the Corel community page too. I love creating macros but I'm very limited in the ability to write them. I use more of a cut and paste code method. Post exactly what you're trying to do and someone there will have an answer. Not sure about using the term "text box" though. Unless of course you're referring to a pop up text box to enter text into. You can just type artistic or paragraph text in corel and then run a macro to change characters as needed.