<div>Chris:</div>
<div> Thanks for your respond.</div>
<div> I changed to use the loopback's attach function, and it makes netdemo.exe work.</div>
<div> so i guess there is something wrong with my own attach function, what do you think ?</div>
<div> </div>
<div> And I wonder how to know if the driver detect hardware correctly or not .</div>
<div> </div>
<div> Best wishes.</div>