The easiest way to duplicate a movieClip in Flash AS3 that resides in your library is to first create your clip; then, in the library, right click on it and select Linkage…, and finally check the Export for ActionScript check box.

Here’s a step by step in case you got lost while doing the initial steps to duplicate your movieClip using AS3.

1. Create your Clip.  I just made a simple rectangle for an example with a motion tween.

2. Right Click your clip in the library and select “Linkage…” and then check “Export for ActionScript”.

What this does is make a class called “myMC” that we can now call using actionscript 3.

3.  Put the following actionscript on frame one of your main timeline:

addEventListener(MouseEvent.CLICK,makeABox);

var i:Number = 1; //i will be the total number of boxes

function makeABox(e:Event):void {
trace(“new box #” + i);
var newBox:myMC = new myMC();
addChild(newBox);
newBox.x = stage.mouseX;
newBox.y = stage.mouseY;
i++;
}

So what this all means is, we use addEventListener to listen for a mouse click.  When a mouse click is detected, it runs the function makeABox.  This function calls our new class “myMC” and adds a new child clip using addChild.  We set the X and Y of the clip by detecting the X and Y of the mouse on the stage.

Here’s a screen shot:

Here are the source files, happy flash actionscript 3 – ing:

duplicateMovieAS3.fla

duplicateMovieAS3.swf

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