On Feb 21, 2012, at 6:59 AM, ronald b. kopelman wrote:

> This involves learning how to program a usb device. I expect to do this, of 
> course in Obj-C.

I don’t know of any Objective-C USB APIs. I suspect you’re going to have to get 
jiggy with IOKit…

(In general, don't assume there are Objective-C APIs for everything in the OS. 
There is a lot of lower-level non-GUI stuff that’s accessible only through C. 
Which is still callable from a Cocoa app, of course, just not quite as 
convenient.)

—Jens
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