Events during UI Component Creation

An event is a signal for the Flash Player to perform some action

Two type of events:
System Event - are dispatched by the Flex framework.
User Event - are dispatched in response to user interaction

Following are the Events dispatched during creation of a Flex Component.
1. Preinitialize  - Dispatched when a component has been created in a rough state, and no children have been created.

2. Initialize - dispatched when a component and all its children have been created, but before the component size has been determined.

3. creationComplete - Dispatched when the component has been laid out and the component is visible (if applicable). This is a system event which is used mostly to load data into the component.