I was reminded of bug 414049 yesterday, a bug I filed about getting screenshots from our unit test machines after every run so we could see if there was obviously something wrong with the machine (like error dialogs covering the screen). Linux and OS X tend to have built-in tools to grab screenshots (as mentioned in the bug), but Windows does not. I searched around for a free tool to do the job, but all I could find was shareware. It’s possible there’s a free tool out there that I just couldn’t find, but I figured I would just write one. After a bit of poking around on MSDN, I wrote screenshot.cpp. It’s only about 70 lines of C++, hard to believe people pay money for stuff like that. I’ve placed it under a BSD license, since it’s useful code and I couldn’t find a simple self-contained example like this anywhere.

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