I'm in a little late in the day on this, but I'll pitch in a little tech info. I know from first hand experience that the PrtScn button had worked the same in every Microsoft OS from 2000 Pro through 7. With the possible exception of ME, I have used that feature throughout the years. The function is simple. Hit the button, and an image of whatever is on the screen goes into the system clipboard. If you use the combination Alt+PrtScn, you only get the active window. In order to save that, you have to pause the flight and paste it into your favorite image editor and save the file.
That's where FSScreen comes in. When that's running, any image that gets copied to the system clipboard gets pulled right back out and turned into a 24-bit bmp file located in the same folder as the program itself. So be careful not to hold down the button, because you'll have a few hundred megabytes in short order. Oh, and it plays hell with your mind when you're trying to copy/paste in your graphics app if you forget FSScreen is running.
While FSScreen does what it does extremely well, that's exactly all it does. That's where
YAFSScreen comes in. It's basically FSScreen with more options, such as output format and output location.
The rest of the screen grab apps do their own thing as far as options, trigger key, and other bells and whistles. So the bottom line is this: Use what works best for you. Just remember that a heavy system footprint will pull down your frames. Personally, I prefer the KISS principle, so I still with the simplest one - FSScreen. It's a simple stand-alone executable with almost no system footprint, and I prefer to do my own format conversion after editing the source bitmap.
So... How's that for muddying things up?
.
