Thanks for your question. We plan to implement a Windows 7 theme for our next major release. We already have developed our design for the theme. However, since we are currently working on a new, major version of our Visual Style Builder tool, we still have not implemented the Windows 7 theme. Our aim is to use this task as a proof of concept for the new version of Visual Style Builder
I hope this answers your question. You can write back anytime you need assistance or have any questions.
the Telerik team