Hem, I don't know if it was me being blind or if they have been added in the docs since, but anyway, thanks! And I'll add a general Thank You for all the small things that I've been asking for or complaining about and that you guys have been adding to Racket and I didn't notice right away. Laurent <div class="gmail_extra"> <div class="gmail_quote">On Thu, Nov 8, 2012 at 9:12 AM, Laurent <<a href="mailto:laurent.orseau@gmail.com" target="_blank">laurent.orseau@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, Is there a reason that ffi/unsafe does not export ctype-scheme->c and ctype-c->scheme? Because I find them very useful in practice. Or should I avoid using them for some reason? Laurent </blockquote></div> </div>