Help with LSX Toolkit

I’m playing around with the LSX toolkit but got stuck, when it comes to access a foreign object.

I have a function like this one:

LSXBool DoStuff ( NotesRichText& rtItem)

and I would like to retrieve the content of rtItem for further use.

Can someone show me , how to access rtItem, pls. ?

I cannot find it in thw help files.