Unfortunately this scenario isn't supported by the RadTabControl for now. However, the feature is added in our PITS
where you can vote for it thus increasing its priority.
Please accept our apology for the caused inconvenience.
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