Oliver Goldman, a member of the AIR engineering team, posted a blog entry titled "Using InvokeEvent.reason in AIR 1.5.1" that describes a new API that was also added. If you have built an AIR application that launches at startup, you may want to check out Oliver’s overview of how this feature works.
You do not need to recompile your application to take advantage of the 1.5.1 improvements. However, if you want to take advantage of the new APIs introduced in this release you will need to update your application descriptor to 1.5.1 (see New APIs section of the release notes) and recompile your application.
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