Declare the public interfaces

The first step in creating a native extension is determining the extension’s public interfaces. Application code uses these public interfaces to interact with the extension. ActionScript code goes in files with the .as extension. Create a .as file with your class definition. For example, the following code shows the declaration of a simple TVChannelController extension class, without yet filling in its implementation. This simple class allows an application to manipulate the channel setting on a hypothetical TV.

package com.example { 
    public class TVChannelController extends EventDispatcher { 
         
        public function TVChannelController() { 
        } 
 
        public function set currentChannel(channelToSet:int):void { 
        } 
 
        public function get currentChannel():int { 
        } 
    } 
} 

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