How to code for flashPlayer 10.2 inside of flash

I am wanting to try some of the new features of Flash Player 10.2 in flash.When I go to import some of the new classes they 开发者_Python百科do not work.

How can I set Flash up to use the new features of the current SDK?

You can, if you compile using the Flex SDK from the Flash IDE. You just need to make sure to get an SDK that compiles toward 10.2; probably the Hero builds.

However, the Flash IDE is notoriously bad for coding. I'd recommend always using something external.