Hi Christian,
This RadToolTip property was implemented in the latest service pack which is available in your
Client.net account
-
RadControls_Prometheus_2007_3_1425.
If you experience problems, please open a new support ticket and send us a small sample project where we can reproduce them - we will check the project and do our best to help.
Kind regards,
Georgi Tunev
the Telerik team