Re: How to add a filter?

If I write this: CComPtr<IBaseFilter> pSobel;

The first error of my program is this one:
1>d:\documents and settings\alex\escritorio\prueba2\webcam.cpp(20) :
error C2065: 'CComPtr' : undeclared identifier

Let me explain something. I'm trying to make an app as simple as this
one: want to read from my webcam and then I want to process the video
stream of the camera thorugh a Sobel filter already working (i tested
this in the graph edit program).

To make this I have get lot of examples from internet and from some
books and now I don´t know very good how it works. I think it would be
easier if you can tell me how can I:

1. Make my app access to the camera, my actual program searches for the
webcam with an external function I don't understand...I think it would
be easier going through the file source filter directly
2. Opening the sobel filter and connecting the filter to the exit of
the source filter (maybe before I need a Smart tee filter)
3. Render the streams I have passed through the Sobel filter.

I think is a very easy program but I have lots of problems if I try to
write it myself so I got the examples I mentioned and now I don't
understand my app.

Thank you

.

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