I followed the Switching Theme at Runtime
and some other help pages and blog page to create a small application
that let me change the style of the application (including the main
window) at runtime.
The application works great, switching the theme of all the controls, even MS controls.
The only problem I see is with the MS label control that does not switch theme automatically. As there is no Telerik control to replace this one, automatic theme switching would be nice for this control.