Scheme in LilyPond

[Charles Winston]

Hi,

I’m fooling around with using Scheme in lilypond files, making some way on my 
GSoC chords project. I’m trying to call the make-note-ev procedure found in 
scm/chord-entry.scm on line 196. I’ve written something simple:

#(begin
        (define root (ly:make-pitch 0 0 0))
        (display (make-note-ev root))
)

And I get an error saying that make-note-ev is an unbound variable. I thought 
that we could call Scheme procedures from the source in lilypond files. What am 
I missing here?

Thanks,
Charles