Ext.MessageBox

 Ext.MessageBox.show({
                        title: this.msgTitle,
                        msg: action.result.message,
                        buttons: Ext.Msg.OK,
                        icon: Ext.Msg.INFO,
                        fn: function (buttonId, text, opt) {
                            switch (buttonId) {
                                case 'ok':
                                    this.getLivingAreaStore().load();
                                    break;
                            }
                        },
                        scope: this
                    });