>My client has got new laptops for a bunch of users, and the screen resolution is not as good as the old ones.
>What I'd like to do is cycle though all the forms in my project and see which ones have a .height > 700. Is there a quick way to do this?

Did you try GoFish4? It should be able to give you what you want in just a few seconds.
http://vfpx.codeplex.com/wikipage?title=GoFish&referringTitle=Home