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I can't imagine why they aren't being captured, but I also have no idea how Camtasia is capturing the data from the screen. The titlebar button windows are created using something called layered windows (WS_EX_LAYERED) which may have something to do with it. They don't behave like standard windows. I'm going to mark this topic as complete for now, as there isn't much I can do about Camtasia.
Probably best that it doesn't work..., eh? 
