I think this is available only when you are playing a DVD and not available if you are playing a file on your computer.
Power DVD (12) has a capture facility. This is from the help file.
Capturing Images
1. During playback, click the button in the More Functions window or press C on your keyboard to capture a frame of the current video content.
2. To be more precise, you may pause the scene, play it in slow motion, or
step frame, and then capture the exact desired frame of video.
Does that help?
Of course if you decide to do video editing, then you can do the same in Power Director. A slightly different procedure though.
Let us know if you want more information.
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BoilerPlate: To posters who ask for help -- it is nice to thank the volunteers who try to answer your questions !
Anything I post unless stated with a reference is my personal opinion.