One of the additions to the Flash MX 2004 documentation that’s new with the 7.2 update is information and a list of steps on how to create a custom theme Defaults class. This is important when creating a new theme and you want to set the defaults for many components, as opposed to just a few style settings.
The complication with Defaults is that it has a reference from FocusRect so you need to provide both the Defaults class and the FocusRect class.
The example includes the two classes, Defaults and FocusRect, along with a FLA that has one component in it to demonstrate that the custom theme is being used.
The custom theme only makes the window title red, and thus could have been easier implemented using setStyle, but it’s meant as an example of creating a custom Defaults class and thus serves that purpose.