lexer from PB, you can not change the folding word, so you can not really
support PB 4.xx. Lexer not flexible. You can create your own lexer, but this
is hard stoff

RaEdit is more easy but have not all features of scintilla.
For your own scripting language or so, raedit is the better alternate.
I think, is a very usefull lib and we working to make it easier

greetings
Thomas