# ExternalInterface.addCallback

**URL:** <https://forum.kirupa.com/t/externalinterface-addcallback/212072>\
**Category:** flash\
**Created:** [January 8, 2007, 11:38am UTC](https://forum.kirupa.com/t/externalinterface-addcallback/212072 "2007-01-08T11:38:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sivant](https://avatars.discourse-cdn.com/v4/letter/s/cc9497/32.png) [@sivant](https://forum.kirupa.com/u/sivant)\
**Post date:** [January 8, 2007, 11:38am UTC](https://forum.kirupa.com/t/externalinterface-addcallback/212072/1 "2007-01-08T11:38:51Z")

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i have a flv movie and i need to be able to stop it through javascript. so i found out that i need to use ExternalInterface.addCallback . but can anybodt tell me how exactly do i work with this? what should be my next step?