This feature has not been implemented yet.
You can open a support thread for RadContextMenu to get more detailed information on the matter.
Regards,
Nik
Telerik
TRY TELERIK'S NEWEST PRODUCT - EQATEC APPLICATION ANALYTICS for SILVERLIGHT.
Learn what features your users use (or don't use) in your application. Know your audience. Target it better. Develop wisely. Sign up for Free application insights >>