[wdmaudiodev] Problem writing to endpoint property store using Standard user account on Vista

  • From: "Michael R. Preston" <mike@xxxxxxxxxxxxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Tue, 17 Oct 2006 22:15:05 -0700

I'm seeing a problem writing to the endpoint property store from an application or from a property page extension in the Sound control panel when running on a Standard user account. When doing an OpenPropertyStore() on the default endpoint's MMDevice with either STGM_READWRITE or STGM_WRITE, the call fails. Opening the property store with STGM_READ still works, though. However, the exact same code (with STGM_READWRITE specified) works on an administrator account. Could this be a problem with unsigned drivers or APOs? I noticed the problem in RC1, and it's still there in RC2. The problem doesn't happen with the built-in system effects, but does happen with my custom APO. Anyone have any ideas?

|            Mike Preston          | Home/Office: (360)756-1655 |
| E-mail: mike@xxxxxxxxxxxxxxxxxxx |        Cell: (360)303-9331 |
|     The man who follows the crowd will usually get no         |
|     further than the crowd.  The man who walks alone is       |
|     likely to find himself in places no one has ever been.    |
|                     -- Alan Ashley-Pitt                       |

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