Autosizing Spark TextArea or RichText 'Hello World'

I need a 'Hello World' example built using a Flex Spark TextArea or RichText component. The example should have the following: Done in ActionScript, not MXML. Must be able to autosize vertically. The Spark control's width and height should be adjusted to show all the content in the control. Must use the '[login to view URL]' function or similar so HTML can be imported. Please bid with a working example.