In older versions of Windows, if you had a video playing, took a screenshot, and pasted that screenshot into Paint, you could sometimes see the video continue to play inside Paint. What kind of sorcery enabled this to happen? A few of you will realise instantly why this used to happen: render surfaces. Back in at least the Windows 9x days, playing video involved drawing solid green where you wanted the video to go (the video player window), rendering the video pixels to a surface shared with ...
