# Study as3.0?

**URL:** <https://forum.kirupa.com/t/study-as3-0/275665>\
**Category:** Uncategorized\
**Created:** [November 17, 2008, 12:28pm UTC](https://forum.kirupa.com/t/study-as3-0/275665 "2008-11-17T12:28:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![arundracula](https://avatars.discourse-cdn.com/v4/letter/a/5f8ce5/32.png) [@arundracula](https://forum.kirupa.com/u/arundracula)\
**Post date:** [November 17, 2008, 12:28pm UTC](https://forum.kirupa.com/t/study-as3-0/275665/1 "2008-11-17T12:28:44Z")

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How can I study the changes in AS 3.0 from 2.0?  
I know AS 2.0. But I don’t know to define classes in it. All AS 3.0 tutorials start with “this is a tutorial for beginners…”.  
But didn’t help me actually. All contains some packages and classes. Is there anything other than this?

I have some problems learning AS 3.0 because I know some AS2.0

Some of them are:  
How do I play or stop the \_root timeline calling from inside another movieclip.  
In 2.0, I know it is \_root.gotoAndPlay() or \_root.play(). This won’t work in AS3.

How to make a simple preloader for the swf using the ENTER\_FRAME event?

I want some nice easy tutorials to migrate into AS3. Do you know some which shows these types of differences?