RadTabStrip supports skinning - you can change the entire appearance of the tabStrip by changing a single property -
Skin. A skin is essentially a set of images and CSS styles applied to the tabStrip.
There are several embedded skins in RadTabStrip for ASP.NET AJAX. You can use either of
them by setting the
Skin property to the skin's name. You can even
set the skin in design time using the Smart Tag. If the Skin property is not set, the Default
skin will be used.
If you need to alter a skin or apply your custom skin to the control, please refer
to the
Controlling Visual Appearance section in the help manual.