Frank wrote: >>Be aware that on end user systems APOs must pass through the Windows Logo program as part of audio driver >>package in order to be signed properly to load in the audio system. Otherwise the APOs will not be used. Yes, i know that frank, i ll surely submitt the driver to signing once i completed it. Now i wanted is some debug messages from my APO, or some execution points,I tried to use OutputDebugString to view the debug messages, but no luck, and also tried to write to a file, but no luck. any other ways?? On Mon, Oct 12, 2009 at 10:44 PM, Frank Yerrace <Frank.Yerrace@xxxxxxxxxxxxx > wrote: > Be aware that on end user systems APOs must pass through the Windows Logo > program as part of audio driver package in order to be signed properly to > load in the audio system. Otherwise the APOs will not be used. > > > > Frank Yerrace > > Microsoft > > > > This posting is provided "AS IS" with no warranties, and confers no rights. > > > > *From:* wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto: > wdmaudiodev-bounce@xxxxxxxxxxxxx] *On Behalf Of *Dennis Scott > *Sent:* Sunday, October 11, 2009 11:23 PM > *To:* wdmaudiodev@xxxxxxxxxxxxx > *Subject:* [wdmaudiodev] Using APO LFX with virtual audio driver in > Vista/win7 > > > > Can i build an APO LFX in vista/win7 for my virtual audio driver?? > > > 1. I modified swap sample and tried to associate with my driver but i am > not successful. how exactly can i associate the APO dll with my driver? > 2. Any special support has to be provided in my driver to associate an APO > with it? > > dennis scott >