import flash.desktop.NativeApplication;
 import flash.events.Event;
 
private function createDockIconMenu():void{
    if(NativeApplication.supportsDockIcon){				
		var dockIcon:DockIcon = NativeApplication.nativeApplication.icon as DockIcon;
		
		var dockMenu:NativeMenu = new NativeMenu();
		var command:NativeMenuItem = dockMenu.addItem(new NativeMenuItem("Command"));
		command.addEventListener(Event.SELECT, onCommand);
		
		dockIcon.menu = dockMenu;
	}
}

 private function onCommand(event:Event):void{
 	//do command...
 }

 import flash.display.DockIcon;
 import flash.display.NotificationType;
 import flash.desktop.NativeApplication;

 if(NativeApplication.supportsDockIcon){
     var dockIcon:DockIcon = NativeApplication.nativeApplication.icon As DockIcon;
 	dockIcon.bounce(NotificationType.CRITICAL);
 }

 package {
    import flash.desktop.DockIcon;
	import flash.desktop.NativeApplication;
	import flash.display.Loader;
	import flash.display.NativeMenu;
	import flash.display.NativeMenuItem;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.TimerEvent;
	import flash.net.URLRequest;
	import flash.utils.Timer;

	public class AnimatedDockIcon extends Sprite
	{
		private var imageURLs:Array =  ['gfx/frame01.png',
										'gfx/frame02.png',
										'gfx/frame03.png',
										'gfx/frame04.png'];
		
		private var images:Array = new Array();
		private var animTimer:Timer = new Timer(100);
										
		public function AnimatedDockIcon()
		{
			NativeApplication.nativeApplication.autoExit = false;
			
			addEventListener(Event.COMPLETE, loadImages);
			loadImages();
			
			animTimer.addEventListener(TimerEvent.TIMER,advanceFrame);
			addMenu();
			stage.nativeWindow.close();
		}
		
		private function addMenu():void{
			var menu:NativeMenu = new NativeMenu();
			var start:NativeMenuItem = menu.addItem(new NativeMenuItem("Start animation"));
			var stop:NativeMenuItem = menu.addItem(new NativeMenuItem("Stop animation"));
			start.addEventListener(Event.SELECT, startTimer);
			stop.addEventListener(Event.SELECT, stopTimer);
			
			var dockIcon:DockIcon =	NativeApplication.nativeApplication.icon as DockIcon;
			dockIcon.menu = menu;
		}
		
		private function startTimer(event:Event):void{
			animTimer.start();
		}

		private function stopTimer(event:Event):void{
			animTimer.stop();
		}

		private var currentFrame:int = 0;
		private function advanceFrame(event:Event):void{
			if(currentFrame < images.length){
				currentFrame++;
			} else {
				currentFrame = 0;
			}
			NativeApplication.nativeApplication.icon.bitmaps = [images[currentFrame]];
		}
		

		private function loadImages(event:Event = null):void{
        	if(event != null){
        		images.push(event.target.content.bitmapData);
        	}
        	if(imageURLs.length > 0){
        		var urlString:String = imageURLs.pop();
        		var loader:Loader = new Loader();
        		loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadImages, false, 0, true);
				loader.load(new URLRequest(urlString));
        	} else {
        		var complete:Event = new Event(Event.COMPLETE,false,false);
        		dispatchEvent(complete);
        	}
        }
	}
}