Adobe Flex/as3:如何实现自定义拖放游标

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"
               creationComplete="init()">

    <s:Button id="myButton"
              x="100" y="100"
              label="Drag me!"
              dragEnabled="true"
              dragStart="onDragStart(event)"/>

    <s:Image id="cursorImage"
             source="path/to/your/custom/cursor/image.png"
             visible="false"/>

    <fx:Script>
        <![CDATA[
            import mx.controls.Alert;
            import mx.core.DragSource;
            import mx.events.DragEvent;

            private function init():void {
                cursorImage.width = 32;
                cursorImage.height = 32;
            }

            private function onDragStart(event:DragEvent):void {
                var dragSource:DragSource = new DragSource();
                dragSource.addData(myButton, "customCursor");
                DragManager.doDrag(myButton, dragSource, event, cursorImage, -cursorImage.width / 2, -cursorImage.height / 2);
            }
        ]]>
    </fx:Script>
</s:Application>