Kinect SDK 1.7 - How to control WPF elements Inside/outside the Kinect Region

Kinect SDK 1.7 - How to control WPF elements Inside/outside the Kinect Region

I´m trying to work with Kinect SDK 1.7 in WPF and C#.
Is there any option how to control WPF elements - for example WPF button,
WPF slider, etc. I cannot find how to do this. When I take a WPF button to
Kinect region the KinectPointer doesn´t react with these controls. I
thought that this pointer is something like mouse pointer.
Please can you help me, how to do that?
Thank you very much!