I, w:User:RN, feel it is covered by fair use because:
This picture is important because it demonstrates a part of DirectShow.
No free or public domain images have been located for this program.
The screenshot does not limit the copyright owners' rights to distribute the program in any way.
The screenshot is intended to represent this program, and only this program. Its inclusion in the article is important because it is a presentation of a certain aspect of DirectShow. The image accompanies a section in the article that discusses the relevant part of the program in question.
The screenshot is being used for informational purposes only, and its use is not believed to detract from the program in any way.