Set the command parameter to be something like:
And just apply it when executed.
Also setting the theme on the root will not propagate the theme to all controls. You will have to create somewhat property and bind the telerik:StyleManager.Theme to it.
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!