Interfaces
 InterfaceDescription
 IBorder The IBorder interface defines the interface that all classes used for border skins should implement.
 IButton The IButton interface is a marker interface that indicates that a component acts as a button.
 IChildList The IChildList interface defines the properties and methods for accessing and manipulating child lists, which are subsets of a DisplayObjectContainer's children.
 IConstraintClient The IConstraintClient interface defines the interface for components that support layout constraints.
 IContainer IContainer is a interface that indicates a component extends or mimics mx.core.Container
 IDataRenderer The IDataRenderer interface defines the interface for components that have a data property.
 IDeferredInstantiationUIComponent The IDeferredInstantiationUIComponent interface defines the interface for a component or object that defers instantiation.
 IFactory The IFactory interface defines the interface that factory classes such as ClassFactory must implement.
 IFlexAsset IFlexAsset is a marker interface with the following meaning: if a class declares that it implements IFlexAsset, then that class represents an asset -- such as a bitmap, a font, or a sound -- that has been embedded in a Flex application.
 IFlexDisplayObject The IFlexDisplayObject interface defines the interface for skin elements.
 IFlexModule The IFlexModule interface is used as an optional contract with IFlexModuleFactory.
 IFlexModuleFactory The IFlexModuleFactory interface represents the contract expected for bootstrapping Flex applications and dynamically loaded modules.
 IFontContextComponent Allows a component to support a font context property.
 IIMESupport The IIMESupport interface defines the interface for any component that supports IME (input method editor).
 IInvalidating The IInvalidating interface defines the interface for components that use invalidation to do delayed -- rather than immediate -- property commitment, measurement, drawing, and layout.
 IMXMLObject The IMXMLObject interface defines the APIs that a non-visual component must implement in order to work properly with the MXML compiler.
 IProgrammaticSkin The IProgrammaticSkin interface defines the interface that skin classes must implement if they use the name property skin interface.
 IPropertyChangeNotifier The IPropertyChangeNotifier interface defines a marker interface.
 IRawChildrenContainer The IRawChildrenContainer interface defines the APIs for containers that can return an IChildList that represents all their children.
 IRectangularBorder The IRectangularBorder interface defines the interface that all classes used for rectangular border skins should implement.
 IRepeater The IRepeater interface defines the APIs for Repeater public APIs of the Repeater object.
 IRepeaterClient The IRepeaterClient interface defines the APIs for components that can have multiple instances created by a Repeater.
 IStateClient The IStateClient interface defines the interface that components must implement to support view states.
 ISWFBridgeGroup A sandbox bridge group is a group of bridges that represent applications that this application can communicate with.
 ISWFBridgeProvider An implementor of ISWFBridgeProvider provides a bridge to an application in a different security sandbox or to an application that was compiled with a different version of the Flex compiler and is running in a separate ApplicationDomain.
 ISWFLoader The ISWFLoader interface defines an API with special properties and method required when loading compatible applications and untrusted applications.
 IToolTip The IToolTip interface defines the API that tooltip-like components must implement in order to work with the ToolTipManager.
 IUIComponent The IUIComponent interface defines the basic set of APIs that you must implement to create a child of a Flex container or list.
 IUID The IUID interface defines the interface for objects that must have Unique Identifiers (UIDs) to uniquely identify the object.
 IUITextField The IUITextField interface defines the basic set of APIs for UITextField instances.
Classes
 ClassDescription
 ClassFactory A ClassFactory instance is a "factory object" which Flex uses to generate instances of another class, each with identical properties.
 ComponentDescriptor ComponentDescriptor is the base class for the UIComponentDescriptor class, which encapsulates the information that you specified in an MXML tag for an instance of a visual component.
 Container The Container class is an abstract base class for components that controls the layout characteristics of child components.
 ContainerCreationPolicy The ContainerCreationPolicy class defines the constant values for the creationPolicy property of the Container class.
 ContainerGlobals 
 ContainerLayout The ContainerLayout class defines the constant values for the layout property of container classes.
 DragSource The DragSource class contains the data being dragged.
 EdgeMetrics The EdgeMetrics class specifies the thickness, in pixels, of the four edge regions around a visual component.
 EventPriority The EventPriority class defines constant values for the priority argument of the addEventListener() method of EventDispatcher.
 FlexLoader FlexLoader is a subclass of the Player's Loader class.
 FlexShape FlexShape is a subclass of the Player's Shape class.
 FlexSprite FlexSprite is a subclass of the Player's Sprite class and the superclass of UIComponent.
 FlexTextField FlexTextField is a subclass of the Player's TextField class and the superclass of UITextField.
 FlexVersion This class controls the backward-compatibility of the framework.
 LayoutContainer Flex defines a default, or Application, container that lets you start adding content to your module or Application without explicitly defining another container.
 ScrollControlBase The ScrollControlBase class is the base class for controls with scroll bars.
 ScrollPolicy Values for the horizontalScrollPolicy and verticalScrollPolicy properties of the Container and ScrollControlBase classes.
 SpriteAsset SpriteAsset is a subclass of the flash.display.Sprite class which represents vector graphic images that you embed in a Flex application.
 SWFBridgeGroup A SWFBridgeGroup represents all of the sandbox bridges that an application needs to communicate with its parent and children.
 UIComponent The UIComponent class is the base class for all visual components, both interactive and noninteractive.
 UIComponentCachePolicy The ContainerCreationPolicy class defines the constant values for the cachePolicy property of the UIComponent class.
 UIComponentDescriptor A UIComponentDescriptor instance encapsulates the information that you specified in an MXML tag for an instance of a visual component.
 UIComponentGlobals 
 UITextField The UITextField class defines the component used by many Flex components to display text.
 UITextFormat The UITextFormat class represents character formatting information for the UITextField class.