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Each component has parameters that you can set to change its appearance and behavior. A parameter is a property or method that appears in the Property inspector and Component Inspector panel. The most commonly used properties and methods appear as authoring parameters; others must be set using ActionScript. All parameters that can be set while authoring can also be set with ActionScript. Setting a parameter with ActionScript overrides any value set while authoring.
All v2 components inherit properties and methods from the UIObject class and the UIComponent class; these are the properties and methods that all components use, such as UIObject.setSize(), UIObject.setStyle(), UIObject.x, and UIObject.y. Each component also has unique properties and methods, some of which are available as authoring parameters. For example, the ProgressBar component has a percentComplete property (ProgressBar.percentComplete), while the NumericStepper component has nextValue and previousValue properties (NumericStepper.nextValue, NumericStepper.previousValue).
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