RadTabStrip for ASP.NET AJAX Version Q3 2008 released 11/25/2008 (release history)

RadMultiPage acts as a container for page views. Each RadPageView control in turn contains child controls such as buttons and text boxes. You can programmatically add/remove show/hide a particular RadPageView on the sever and client side.

The RadMultiPage and the RadTabStrip controls are natively integrated. All you need to do is set the MultiPageID property of the tabstrip to the ID of the respective multipage instance. If the controls are not inside the same naming container, you should use the value of the UniqueID property of your multipage.