Question

There is a way to know the flash player version installed on the computer that runs our SWF file with Action Script 3.0?

Answer 1

If you are programming from within the IDE the following will get you the version

 trace(Capabilities.version); 

If you are building a custom class the following should help. Make sure that this following code goes into a file named VersionCheck.as

 package {     import flash.system.Capabilities;      public class VersionCheck     {         public function VersionCheck():void         {             trace(Capabilities.version);         }     } } 

Hope this helps, always remember that all of the AS3 language can be studied online here http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/.