I was looking at the Sitefinity CMS and was curious as to how the generic content editor appears on the page as it does? (figure 2 in the link provided): http://www.sitefinity.com/help/developer-manual/generic-content-public-controls.html.

I have a project where I open an editor for HTML on a web page and currently the editor opens in a RadWindow. The Sitefinity way of doing is seems much faster and provides the added functionality of opening another "window" inside the editor window (figure 3 in the link provided). If possible I would love to see an example project of how to do this, if not I would simply like to know what Rad Control is used to display the editing window.

Edit: After looking at some of the videos it appears that it is a RadWindow, if it is then is the parent for the second window (figure 3) the page, or the first window? Also how does it load so fast? My RadWindow takes ~5 seconds to load.