Sasha Goldshtein (not the same as Sasha my MVP lead or for that matter Sasha my nephew - seems some names just follow me around) has another great Windows 7 post
and this one features native C++ code for extra fun. It tackles a problem you're likely to run into if you're doing Windows 7 development - what should you use as a toolbar preview if your app has a number of tabbed views? As you probably know IE 8 shows you multiple previews, one for each tab (within reason - I have dozens of tabs open some times and it doesn't show all of them) so you might want the same effect for your application.
The idea is that the app looks like this:
And the thumbnails look like this:
One for each tab. Sasha has provided a pair of blog posts explaining this, and you can download the code from his SkyDrive. Very nice!
PS: Want to do it in managed code? Well go get the Code Pack
then. Tabbed Thumbnails are handled nicely there.