This is time well spent, check out the Windows 7 Compatibility training session.
Some of the resources referenced are
- Microsoft Application Compatibility Toolkit 5.5
- Microsoft Application Verifier
- Chris Jackson's "The App Compat Guy"
- More Windows 7 Sessions
and finally head to over to "Give your application the green light", get yourself registered, it's free, stacks of resources and support, get ready and get your application in to the online catalogue in time for the Windows 7 Launch on October 22nd.