Unfortunately, as the error states, it turned out that the ElementFromPoint() method for WPF is not implemented. However I also discovered that we have this method implemented for Silverlight, so it shouldn't take us too long to get this implemented for WPF as well. I logged this as a feature request. You can track its progress and vote for it here: Public URL
. Thanks for notifying us about the missing implementation.
All the best,
the Telerik team