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<How to Use a Document Class in Flash ⁄ >

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I'll admit it - sometimes, coding entirely on the timeline is useful. It's a quick way to test out an effect, and the easiest way to sync actions to specific frames of an animation.

But for any project that relies more on code than on animation, there are serious disadvantages. All your ActionScript is trapped inside the FLA file; you can't split the programming between different developers, you have to copy and paste code if you want to re-use it, and you're forced to use Flash's Actions Panel.

Using class files sets your code free. And it's really no harder than coding on the timeline; it just involves a little more setup. I'll walk you through creating a Flash project that uses classes, then break down a class file in detail.

(Part of the reason we're switching to classes is to make it easier for AS3 developers that don't use Flash itself to follow our tutorials. If you're one of them, I expect you're used to dealing with classes already, but you can always read this Quick Tip as a refresher - just ignore the bits about Flash!)

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