Finally i am able to install my driver with APO. 1. how to confirm that my LFX is in the audio graph path. 2. if i use "OutputDebugString" in my APO then also i am not able to view debug message in dbgview (dbgviewis ran in addmin prevelage, and Capture Global Win32 is on). On Mon, Oct 12, 2009 at 11:52 AM, Dennis Scott <dennis.scott@xxxxxxxxxxxxxx>wrote: > 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 >