Hi Mat It will not be problem. You can try Creative's new USB Audio product "Sound Blaster Digital Music". It have solve the problem. It can surprise remove when your USB Audio device playing a stream. And I find it will not be a problem in my driver. BR, Tzung-Dar Tsai >From: bart@xxxxxxxxxxxxx [mailto:bart@xxxxxxxxxxxxx] >>> I don't find the DDK say we can't use PortCls to implement USB Audio >>> Driver. >>You can do it, I also did :) > >What happens when you surprise remove your device AND a stream is running? > >The device object remains; it is not destroyed. This causes lots of >problems if you try to connect and use the device again without rebooting :( > >If you found a solution to this, I'd be glad to hear about it. > >Mat >****************** ________________________________________________ ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/