What follows is a list of all the Flash components I have found that can use tabIndex. Without any programming setup, these components can receive focus by pressing the TAB key.
and one that works a bit differently, but is still built-in in Flash:
Note that this list is not complete. It seems there are “hidden” tab-enabled elements out there.
The one I know of is when a TextField has it’s type = TextFieldType.INPUT. As near as I can tell, this turns a TextField object into a TextInput object, and ends up being tab enabled. I suspect there are other hidden tabIndex capable components out there.