I haven't tried anything that extreme, and I'm away from my home computer
where SnagIt is installed so I can't try it at the moment.
There's a free 30-day trial download of SnagIt on the TechSmith site, and
you can open the resulting capture in the free viewer IrfanView
(
www.irfanview.com) to enlarge it and see what you get.
Don't try to take a screen shot of Word, because that will limit you to the
screen resolution. Instead, print to the SnagIt printer driver and tell it
to save the result as TIFF. I'd consider JPG as a second (or lower) choice
because it's a lossy compression method, where TIFF is lossless.