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?

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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.