请教checkbox的label文字怎么换行

请问checkbox的label文字如何换行？
label字体改变后，一行太长，如何换行？

[解决办法]
我没找到简单的办法对应，自定义了一个组件。你看看对不对：

JScript code

package{    import flash.text.TextLineMetrics;        import mx.controls.CheckBox;    public class MyCheckBox extends CheckBox    {        public function MyCheckBox()        {            super();        }                override protected function createChildren():void        {            super.createChildren();                        if (textField != null) {                textField.multiline = true;                textField.wordWrap = true;            }        }                override protected function updateDisplayList(unscaledWidth:Number,                                                  unscaledHeight:Number):void {            super.updateDisplayList(unscaledWidth,unscaledHeight);            var lineMetrics:TextLineMetrics = measureText(label);            var textWidth:Number = lineMetrics.width + 6;            var textHeight:Number = lineMetrics.height + 4;            var paddingLeft:Number = textField.getStyle("paddingLeft") as Number;            var paddingRight:Number = textField.getStyle("paddingRight") as Number;            var paddingTop:Number = textField.getStyle("paddingTop") as Number;            var paddingBottom:Number = textField.getStyle("paddingBottom") as Number;                                    textHeight = (textWidth/(textField.width - paddingLeft - paddingRight))*(textHeight + paddingTop+paddingBottom);            textField.height = textHeight;        }            }}