Hi,

I'm writing a book that will include screenscreens of software
applications and Web sites. I'd like to do the capture of the
screenshots only once. What format would be best for me to save the
screenshots and Web pages? I want to make sure the files are usable
for print. I may also want to use the images on Web pages. Would .tiff
be best? I'm guessing that .gif or .jpeg may not be high enough
resolution. I'm on a PC.

BMP - Bitmap is the native format
JPG with no compression is just about the same - but more widely used

Any lossless format will do. TIFF will be fine, PNG will be fine, BMP
will be fine, they can get big, though. Don't use JPEG.

Don't worry about the resolution, just don't scale the images, no
matter what format you choose.

I would also suggest to have the screen resolution set to highest
setting prior to taking screen shot. That way the image will "have
more dots" and provide a cleaner picture when printed.

You will also want to tweak the screen profile to provide a high
amount of contrast between screen elements.  This is very important if
images will be printed greyscale, Black and white, or dithered.  If
possible try to avoid any eccess images/icons but keep the screens
default settings with out customisations.  People will focus on
content if the window screenshots show default layouts for programs /
browsers and not get hung up of the "wierd" icon in browser toolbar.

I personnally use PNG, but TIF will be just as good.

Remember you may need copyright permission from the software
manufacturer to include screenshots from their software in the book.

Owain