How to build a Flex FormItem with an image button in the label section?

I want to build a flex FormItem extension that adds a button into the item label section, such that there is both a text label and, to the right of it, a button that uses an image icon:

A form item http://img830.imageshack.us/img830/4411/screenshot20100730at331.p开发者_运维技巧ng

Basically, I want to create that 'i' icon, such that I can click on it to display a help overlay for the item in question.

Is there an existing component that does this? If not, how do I do it?

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Try to use grid, gridrow, and grititem, like the html table. and add the label and the "i" image into a horizontal layout container inside the griditem.

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See

http://kennethsutherland.com/2009/05/27/formitem-adding-an-icon/