Flex系统自带的Alert组件是没有图片，提示信息还是英文的，使用起来很不方便，下面是经过封装后的Alert:

package cn.ccb.yn.acms.actionscript
{
    import mx.controls.Alert;
    import mx.controls.Tree;
    import mx.events.CloseEvent;
    import mx.managers.PopUpManager;
    import mx.rpc.events.ResultEvent;
                                                                                                                  
    import spark.components.BorderContainer;
    import spark.components.Button;
    import spark.components.TitleWindow;
    public class MyAlert
    {
        [Embed(source='./assets/icon-info.gif')]
        public static var iconInfo:Class;
        [Embed(source='./assets/icon-error.gif')]
        public static var iconError:Class;
        [Embed(source='./assets/icon-warning.gif')]
        public static var iconWarning:Class;
        [Embed(source='./assets/icon-question.gif')]
        public static var iconQuestion:Class;
        public function MyAlert()
        {
        }
        public static function showInfo(str:String):void
        {
            Alert.yesLabel="确定";
            Alert.cancelLabel="取消";
                                                                                                                          
            Alert.show(str,"提示",Alert.YES,null,null,iconInfo);
        }
        public static function showWarning(str:String):void
        {
            Alert.yesLabel="确定";
            Alert.cancelLabel="取消";
                                                                                                                          
            Alert.show(str,"提示",Alert.YES,null,null,iconWarning);
        }
        public static function showError(str:String):void
        {
            Alert.yesLabel="确定";
            Alert.cancelLabel="取消";
                                                                                                                          
            Alert.show(str,"错误",Alert.YES,null,null,iconError);
        }
        public static function confirm(str:String,obj:Function):Object
        {
            Alert.yesLabel="确定";
            Alert.cancelLabel="取消";
                                                                                                                          
            return Alert.show(str,"警告",Alert.YES|Alert.CANCEL,null,obj,iconQuestion);
        }
        public static function     resultInfo(event:ResultEvent,sucMsg:String,failMsg:String,fuc:Function):void{
            var msg:String = event.result.toString();
            if(msg=="success"){
                MyAlert.showInfo(sucMsg);
                fuc();
                return;
            }
            MyAlert.showInfo(failMsg);
        }
                                                                                                                      
                                                                                                         
                                                                                                                      
        public static function closeWnd(wdm:TitleWindow):void{
            PopUpManager.removePopUp(wdm);
        }
                                                                                                                      
    }
}

resultInfo是一个回调函用函数，提示信息出现确认和取消的时候，当用户选择了确认按钮执行的操作。