Thank you for writing.
You can achieve this behavior by modifying the theme you are using. If you are using a predefined theme, you need to export it, edit it and apply it to your application.
Here is an article on how to export the built-in themes
You can watch videos on how to edit controls' themes on Telerik TV. Here is the Styling Basics with Visual Style Builder
. Here is an article on How to save theme files and how to load them in an application
For the scenario you are trying to achieve, you need to navigate to:
in the Visual Style Builder select TabItemText(TextPrimitive) from the Elements panel and set its Text property according to your needs. You can look at the attached screenshot to get a better idea of what I wrote above. Note that you will have to set values for all states of the element you are using if you want to achieve the scenario. In your case they are just the normal state and the Selected
I hope this will help you out. If you have further need of assistance, I would be glad to provide it.
the Telerik team
Q3’10 SP1 of RadControls for WinForms is available for download
; also available is the Q1'11 Roadmap
for Telerik Windows Forms controls.