import flash.events.MouseEvent;

//fla file

 

import flash.display.Sprite;

import flash.display.DisplayObject;

 

var X:Number = 0;

var Y:Number = 0;

 

stage.addEventListener(MouseEvent.MOUSE_DOWN, begin)

function begin (evt:MouseEvent) {

    var X:Number = mouseX;

    var Y:Number = mouseY;

}

stage.addEventListener(MouseEvent.MOUSE_UP, end);

function end (evt:MouseEvent) {

    var R:Number = Math.sqrt(Math.pow(mouseX-X, 2)+Math.pow(mouseY-Y, 2));

    var round:Sprite = test(X, Y, R);

    addChild(round);

}

//test.as

package

{

    import flash.display.Sprite;

 

    public function test(X:Number, Y:Number, R:Number):Sprite

    {

        var sp:Sprite = new Sprite();

        sp.graphics.lineStyle(1, 0x0);

        sp.graphics.drawCircle(X, Y, R);

        return (sp);

    }

}

round.x = X;

round.y = Y;