Thank you for writing.
I tried to reproduce the described issue, but to no avail. Please note that you should have the Miscellaneous component dropped on your form, because this will allow you to use the OfficeGlass theme that it contains. I am attaching a sample project and a movie which demonstrate the correct behavior. You can play the movie with a web browser of your choice.
I hope this helps. If you have additional questions, feel free to contact me.
All the best,
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.