i think im missing something here, maybe some more reading is needed on my part …. but the method (get-extent)[https://docs.racket-lang.org/gui/snip_.html?q=snip%25#%28meth._%28%28%28lib._racket%2Fsnip..rkt%29._snip~25%29._get-extent%29%29] that needs to be implimented for any new snip% does not return anything ?

okkayyy i think im getting somewhere, the interface is actually a set of … pointers? (boxes) that the snip implimenter then sets to values?

@chris613 Yes, the contents of the boxes will be updated. Can’t remember seeing that type of interface elsewhere.

It seems like a very C interface

yes, those interfaces derive fairly directly from when they were implemented in C++ (long long ago)