Png image based skin
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:Button label="Custom CheckBox" overSkin="@Embed('a.png')" downSkin="@Embed('a.png')" upSkin="@Embed('a.png')"/> </mx:Application>