A Google search for EnableVisualStyles points out two things:
Hope my previous post here on this topic will help clarify a few things.
BTW, the Whidbey release of the Framework will have several improvements in the support
for Visual Styles in Windows Forms, including fixes for the EnableVisualStyles problems.
I would love to talk more about it, but it is too early to do so - hopefully I can
after the PDC release!