Cannot find ExtensionContext

Question

I'm using Flex Builder 4.6 in WinXP, but the line

import flash.external.ExtensionContext;

will get an error message. Why?

Answer 1

Native Extensions for Adobe AIR are code libraries that contain native code wrapped with an ActionScript API. You can use native extensions in an AIR application to access platform features not supported by AIR, to benefit from native-code-level performance for critical algorithms, and to reuse existing native code libraries.

Developing Native Extensions

You can write Native Extensions only for Adobe AIR