Text editing in multiple lines

[gbl08ma Profile Website]

I'm trying to let the user edit text in multiple lines, like on the program editor (slow) or on eActivity (faster). Multi-line input with PrintMini (as seen on the memo editor of eActivity, when you press the "detail" (F3) function) would be even better:

I'm sure there's a syscall (or set of syscalls) that makes it much easier, but I haven't found it yet. The alternative would be to implement a custom system using PrintMini and a custom cursor system, but it would never work as well as the OS solution, and it would mean using flash space with duplicate code (plus the added work of coding the whole input system).

Any ideas?

[gbl08ma Profile Website]

*bump*... I know DisplayMBString2 is not suitable for this task, because I know the meaning of most parameters, and of those that I don't know, they don't seem to specify the height, in lines, of the text. I do not know of any Display* syscalls besides DisplayMBString and DisplayMBString2.
For the cursor and insertion control strings, I only know of EditMBStringChar to insert characters. I know of four versions of EditMBStringCtrl, with 0x120C being the one that takes most parameters (but I haven't investigated what they do). But first, I believe it's more important to discover the syscall used for displaying, and only then the syscalls used for editing.