When to create a class

Over the past few months I've been making the transition from
Flash AS2 to Flex and am comfortable with combining AS3 and mxml,
but the vast majority of my code is stored in functions within a
<mx:Script> tag. Now comes the bigger question: When does it
make sense to put my code in new classes instead of embedding my
code in functions?

Also, wherever possible, take some time to consider what you
will create before you write any formal code. When you start to see
code that will be used in various places in your code, or else code
that might be useful in future Flex applications and components,
put it in a class hierarchy and you will reap immediate and future
benefits.

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