# Custom Extensions in AIR

**URL:** <https://forum.kirupa.com/t/custom-extensions-in-air/281309>\
**Category:** flash\
**Created:** [February 7, 2009, 6:28am UTC](https://forum.kirupa.com/t/custom-extensions-in-air/281309 "2009-02-07T06:28:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![RonH](https://avatars.discourse-cdn.com/v4/letter/r/bcef8e/32.png) [@RonH](https://forum.kirupa.com/u/RonH)\
**Post date:** [February 7, 2009, 6:28am UTC](https://forum.kirupa.com/t/custom-extensions-in-air/281309/1 "2009-02-07T06:28:14Z")

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Hello Everyone,

I was wondering if anyone had heard of a way that you could access the file that was used to open an AIR application. That is, you know how you can double click a .fla and it will open Flash? I want to be able to do that with a AIR application. I’ve already tried it and I know I can select a specific application to open the file with when a user opens that file, I just need to know how to access it.

Also, is there a way to register a AIR application for a specific file type?