Ah. Step three here: http://arcfn.com/2008/05/using-opengl-with-arc.html
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> (require mzscheme) > (require "ac.scm") > (require "brackets.scm") > (use-bracket-readtable) > (require "bitops.scm") > (load "ffi.scm") procedure application: expected procedure, given: #f; arguments were: #<struct:fun-syntax> #<syntax:C:\Program Files\anarki\ffi.scm:18:14> >