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How to call a flash function from flex?

1. Load the AS3 swf file using an instance of SWFLoader.
2. Call the function like this:

How to listen for flash events from flex?

1. // In your Flex app
   /* called when your SWFLoader finishes loading the SWF */
   private function onMySWFLoaded( p_event:Event ) :void
   {
         mySWFLoader.content.addEventListener( “clicked”, onSWFClick );
   }

   /* callback for the clicked event */
   private function onSWFClick( event:Event ) :void
   {
         mx.controls.Alert.show( ‘Click event raised!’ );
   }

2. // In Flash Movie
   /* called when the button in your flash movie is clicked */
   private function onButtonClick( p_event:Event ) :void
   {
         dispatchEvent( new Event( “clicked” );
   }

How to call a flex function from flash at a specific frame?

Embed(source=“../assets/swf/myFlashComponent.swf”, symbol=“Preloader”)]
private var FlashPreloaderSymbol:Class;
private var clip:MovieClip;

clip = new FlashPreloaderSymbol();
addChild(clip);

private function onFlexInitComplete( event:FlexEvent ):void
{
clip.addFrameScript(47, callMyFunction);
}

We wanted to share with you a great video tutorial about how to use Adobe Flash Catalyst and create Flex Applications starting just with an image.
The tutorial explains in details how you can create a Flex button and a scrollbar using Catalyst.