The Visual C++ team has an update for you about their Orcas plans around MFC and the Common Controls in Vista. There are a lot of new APIs in Vista compared to XP, but just as important there are new styles (like the style that makes a button a CommandLink) and messages (like the message to a button that tells it to draw itself with a security shield.) Right now to work with these new "thingies" (my technical term for them) you need to send Windows messages. In Orcas there will be design time support for all this and more. Even the new Common File Dialogs will be yours as if by magic.
Looking forward to it!