When you open your application in a browser, it will be rendered using the presentation layer you use as the extension of your form, usually .wgx for DHTML and .swgx for Silverlight.

This CodeSample shows that you can actually use the best of both worlds, by opening a Silverlight form within an HTMLBox in an application using DHTML presentation.

The application is very simple, so no source code is presented in the article.

Pay special attention to the usage of the SilverlightExtender, which is used to set some Silverlight specific properties, like rotation. When the form is rendered in DHTML presentation, those properties have no effect, only when using Silverlight presentation.

The demo application can be downloaded downloaded here . The application is supplied in Visual Studio 2005 and 2008 formats both in C# and VB.NET.