Is it possible to change which character is used, say from an asterisk to a bullet?
From what I could find it is not possible. The displayAsPassword functionality is actually defined in the flash.text.TextField class, but I couldn't find any accessible way to change the password character. Sorry, I tried.
I don't think there is a way either. If you're really desperate, you could try overlaying another TextField on top that has bullets for the characters underneath
Flex SDK Developer
Adobe Systems Inc.
Try This ( you can use char you would like )
Hope this helps
Just use a font that has a different SHIFT-8 character for the * (asterisk).
Webdings, for example, has an envelope icon for the SHIFT-8 character. Set your password TextField to use it and you'll see your password shows envelopes instead of asterisks.
Find or create a font with bullets (or anything, really) for the SHIFT-8 character and you're set.