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<H1>Accessing USB devices from User Space</H1>
<p>This document describes the details of the programming interface for accessing 
  USB devices and USB interfaces from code running in User Space. This document 
  assumes that you have a basic understanding of the material contained in the 
  document <i>Accessing Hardware From Applications</i> (available at <a href="" target="_blank"></a>.) 
  For definitions of I/O Kit terms used in this document, such as matching dictionary, 
  family, and driver, see the overview of I/O Kit terms and concepts in the &quot;I/O 
  Kit Hardware Access&quot; chapter of Accessing Hardware From Applications.</p>
<p>This document also assumes that you have read the document <i>Working with 
  USB Device Interfaces</i> (available at <a href="" target="_blank"></a>). 
  Please review that document before trying to use this reference.</p>
<p>All of the information described in this document is contained in the header 
  file IOUSBLib.h found at /System/Library/Frameworks/IOKit.framework/Headers/usb/IOUSBLib.h.<br>
<p>&copy; 2001 Apple Computer, Inc.</p>