Great online tool for every flex developer who want to learn more about the styling of there flex applications. Adobe consulting made this great overview of all general visual components in the flex 3. You can find examples of each component css style in the package with a css code preview for even better understandment of the styling of flex.

Click image to goto
flex 3 style explorer. Select a component in the left tree and set the desired preferences.
When finished click to
export css button to export all css code to clipboard.
Finally paste it in a new css file and savw for later usage in your flex project.