[wdmaudiodev] Re: Checking if a driver supports a property or not.

  • From: Lokesh Patakolusu <lokeshp@xxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Mon, 1 Jun 2009 14:54:25 -0400

hi tim,

Thanks for the reply.I wanted to check if the soundmax driver supports the
property or not.Whatever the code i posted before is working fine(able to
create instance).I got stuck up with associating the soundmax driver.Can
anybody pls guide me how to associate the driver since i wanted to check for
soundmax driver.

Thanks for all help.


On Mon, Jun 1, 2009 at 12:50 PM, Tim Roberts <timr@xxxxxxxxx> wrote:

> Lokesh Patakolusu wrote:
> >
> > I am using the following code to check if the driver supports property
> > or not.
> That's not the correct way to instantiate DirectSound.  There are two
> ways:  either you call CoCreateInstance on CLSID_DirectSound (or
> CLSID_DirectSound8) for the IDirectSound (or IDirectSound8) interface,
> and then call its Initialize method, or you call DirectSoundCreate8,
> with returns you an IDirectSound8 interface that has already been
> initialized.  You should be able to query that for an IKsPropertySet.
> Your bare object has not yet been associated with a driver.
> --
> Tim Roberts, timr@xxxxxxxxx
> Providenza & Boekelheide, Inc.
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