How to use DirectShow sample in my application?

[Vaclav_]

I would like to use DirectShow sample code filter – Bouncing Ball. Build in SDK 8.1. I can build a library – Ball.lib , executable Ball.exe and my ancient compiler builds Ball.ax file. All with exception of .ax file looks as DLL’s. I seldom use DLL’s , but when I do I have a control of type of DLL. Two questions – how do I use these files and what kind of DLL was build – how do I tell? The doc with the sample code only instructs how to use Graph Edit, which for my purpose is good for nothing. A sample application using any of the DirectShow samples would be helpful. Any help is as always appreciated. Cheers Vaclav PS I had no luck on DirectShow forums.

[Vaclav_]

OK, for some unknown reason , AKA MS naming convention - these fiters builds are not using dll extension , but ax. And apparently they are "self registering " too.