Currently this functionality is not possible to achieve. With the Q2 2010 release, scheduled to be out in two weeks, we introduce some interactions (hover and select), which you will be able to customize through visual states.
All the best,
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items