ActionScript 3.0 :: Text Arc - Select A Font Then Click Create Text Item?

I have a project that needs to take dynamic text and arc it. Similar to this: http:[url]...In this example, select a font then click create text item.At this point you can slide the meter to change the arc of the text. This is exactly what I need to do.My understanding of what needs to be done is I need to first break the letters of the text field into separate text fields, loop thru them then position and rotate each char to the desired arc. The problem is my trigonometry really bites. I have tried many tutorials and I have gotten similar results, mainly arcing text into a complete circle at different radiuses. But all I need to do is whats in the example, which is allowing the user to gradually arch the text.