Larry, Does this have anything to do with the fact that my APO isn't signed, or just because the app isn't running as administrator? Like I said previously, I'm seing the same problem with the property page extension for the endpoint in the Sound control panel. Also, is this just a problem with the endpoint property store and not the system effects endpoint? Mike -----Original Message----- From: Larry Osterman <Larry.Osterman@xxxxxxxxxxxxx> Subj: [wdmaudiodev] Re: Problem writing to endpoint property store using Standard user account on Vista Date: Wed Oct 18, 2006 7:01 am Size: 2K To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx> That's correct. The endpoint property store is machine-wide and only administrators can modify it. If you need to modify the endpoint property store outside the mmsys.cpl framework, you need to run your applet elevated. -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Michael R. Preston Sent: Tuesday, October 17, 2006 10:15 PM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Problem writing to endpoint property store using Standard user account on Vista 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? Thanks, Mike -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | 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 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ****************** 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.com/ ****************** 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.com/ ****************** 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.com/