# Compatibility Questions - FP10, CS4, AS

**URL:** <https://forum.kirupa.com/t/compatibility-questions-fp10-cs4-as/278706>\
**Category:** flash\
**Created:** [January 4, 2009, 7:07am UTC](https://forum.kirupa.com/t/compatibility-questions-fp10-cs4-as/278706 "2009-01-04T07:07:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![anroy](https://avatars.discourse-cdn.com/v4/letter/a/977dab/32.png) [@anroy](https://forum.kirupa.com/u/anroy)\
**Post date:** [January 4, 2009, 7:07am UTC](https://forum.kirupa.com/t/compatibility-questions-fp10-cs4-as/278706/1 "2009-01-04T07:07:12Z")

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I am using Flash CS3, programming AS3, and targeting FP9 for the moment. However I am seeing references around this board to FP10 and CS4.

My questions:

[LIST]  
[_]On the Adobe site looking at CS4 features, I’m not seeing any changes to ActionScript. It seems to be mostly 3D stuff. Is this the case?  
[_]Do you need to develop in CS4 to target FP10?  
[\*]Even if you don’t need CS4 to target FP10, do you need it to take advantage of new functionality in FP10, or can that be done with CS3?  
[/LIST]