[wdmaudiodev] Does symbolic link work in USB audio filter?

  • From: "Mike Dey" <mdey@xxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Tue, 13 Jun 2006 13:07:02 -0700


I have written a USB filter which can be installed successfully as the lower 
filter of the standard USB audio driver. I need to send IOCTL to my filter 
driver to control my hardware so I create a symbolic link with a specific GUID 
in my filter driver. In my application, I got the device path (by calling 
SetupDi... functions) and call CreateFile() to open it. However, it fails with 
device not found error. 
If I installed my filter driver under a non-standard USB driver, then IOCTL 
works fine. Does anyone know if there's any restriction to use symbolic link in 
a USB audio filter driver?


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  • » [wdmaudiodev] Does symbolic link work in USB audio filter?