# Flash CS3 and Flash CS4 - Any difference in AS3?

**URL:** <https://forum.kirupa.com/t/flash-cs3-and-flash-cs4-any-difference-in-as3/297945>\
**Category:** flash\
**Created:** [October 11, 2009, 12:13am UTC](https://forum.kirupa.com/t/flash-cs3-and-flash-cs4-any-difference-in-as3/297945 "2009-10-11T00:13:35Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![four4swords](https://avatars.discourse-cdn.com/v4/letter/f/87869e/32.png) [@four4swords](https://forum.kirupa.com/u/four4swords)\
**Post date:** [October 11, 2009, 12:13am UTC](https://forum.kirupa.com/t/flash-cs3-and-flash-cs4-any-difference-in-as3/297945/1 "2009-10-11T00:13:35Z")

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Hi,

Is there any differences in Actionscript 3 between Flash CS3 and Flash CS4?  
Apart from Flash CS4 having extra inversekinematic functions, is everything else the same, actionscripting-wise?