[wdmaudiodev] Re: IKsControl
- From: Tim Roberts <timr@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Tue, 02 Feb 2010 11:03:03 -0800
Mark Walker wrote:
> ...
> Specifically, I'm having trouble with
>
> One you have an IBaseFilter, you just fetch an IKsControl interface
> from it:
> CComQIPtr<IKsControl> pKsControl( myFilter );
>
> The problem is that VC++ 2008 doesn't include IKsControl properly, so
> it doesn't build. If I use:
>
> #include "ks.h"
>
> it still tells me that IKsControl is undefined.
It should be in there, but it's also present in ksproxy.h, which
sometimes has fewer conflicts with other include files.
> hr = pBaseFilter->QueryInterface(IID_IKsControl, (void **) &pControl);
>
> returns that the interface doesn't exist. I'm not using smart
> pointers because I'm using VC++ express, no ATL.
Ouch. However, even without ATL, you still have _com_ptr_t available to
you, which has many of the same capabilities.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.
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