<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><div>hi,all</div><div>i know that usb can be catgoryed by class.</div><div>i want to know how spice  to recignize and categroy usb devices? storage,mouse,keyboard....</div><div>and where is the code.</div><div> </div><div>thanks.</div></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span>