When the commercial API came out, I found that they had made quite a few changes. I am sure they are mostly good changes but they broke my previous sample code. Here is the new WPF sample code, unfortunately minus the special effects such as 3D freeze and foreground disappear. Download it at unavailable.
As I said in my last post, the XNA version is still forthcoming. I will have to revamp it to work with the commercial API and I will post an update when it is ready.