Best format for screen shots?

[SimPLsol at aol.com]

I am writing the operating manual for our first Revolution-based product and 
I could use some knowledgeable advice regarding screen shots.

In the past I saved screenshots as PICT files and copied them into Word. I 
printed the Word doc to QuickDraw and Postscript printers.

This time I will also be making PDFs for cross-platform distribution. Since 
PICT is a Mac-only format, would EPS (or some other format) be better?

Thanks in advance.
Paul Looney