SOMEBODY HAS AN ANSWER --> Callbacks for driver communication

NTDEV
1

Hi, I have implemented the callback method for driver communication (like
suggested into your NT Insider document volume 8 issue 4) i.e. with
ExRegisterCallback and ExNotifyCallback.

This is working really well, but event if I unregister and dereference my
callbacks they are still into the \callback\ folder (can see them with
WinObj.exe).

Is it normal or is it something I might doing wrong ?

thanks