Aurora is more than a drawing or painting program. It works with the Avalon object model and the Visual Tree. It also now seamlessly integrates into Visual Studio. It allows you to visually create and edit various levels in the Avalon document. In addition to creating user interfaces and drawings, it allows you to apply attached dependency properties to visual objects; you can also define custom content for content controls. Using it you can use or create libraries of objects and reuse them in your applications. The authoring engine is built as an Avalon DockPanel that can be dropped into an Avalon application or can be embedded in a WinForms application providing instant XAML/Avalon authoring capabilities. The DesignerPanel is the main class for the authoring engine. It is derived from a DockPanel and implements the AuroraDesigner interface which is the main interface for the Aurora Object Model. The DesigerPanel lives in the AuroraDesigner.dll.