What are three ways to skin a component in flex

Question :What are three ways to skin a component in flex?
Answer :: Skinning is the process of changing the appearance of a component by modifying or replacing its
visual elements. These elements can be made up of images, SWF files, or class files that contain
drawing API methods.
There are several ways that you can define skins: inline, by using the setStyle() method, and by using
Cascading Style Sheets (CSS).