Bill, check out
http://fox.wikis.com/wc.dll?Wiki~EssentialMDot~VFPIf a table with lots of fields is currently selected, use of m. can be twice as quick. If you're referencing a few variables inside a tight loop, the difference can become visible.
If you use a variable for a constant you'll want the m. every time apart from the initial declaration.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1