I've been looking into this myself lately. I agree with what Craig said in his post. I can also add that as of today, really only one heavy hitter in the auto-testing world supports MSAA. That's Rational's Visual Test. The bad news is that it doesn't support control discovery via MSAA, so to test a VFP 7.0 application would require a considerable amount of hand coding.
Marty Smith, CSQE