Попробуйте этот код
<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the Halo Alert control. -->
<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">
<fx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.events.CloseEvent;
// Event handler function uses a static method to show
// a pop-up window with the title, message, and requested buttons.
private function clickHandler(evt:Event):void {
Alert.show("Do you want to save your changes?", "Save Changes", Alert.YES|Alert.NO, this, alertClickHandler);
}
// Event handler function for displaying the selected Alert button.
private function alertClickHandler(evt:CloseEvent):void {
if (evt.detail == Alert.YES) {
status.text = "You answered Yes";
} else {
status.text = "You answered No";
}
}
// Event handler function changes the default Button labels and sets the
// Button widths. If you later use an Alert with the default Buttons,
// you must reset these values.
private function secondClickHandler(evt:Event):void {
Alert.buttonWidth = 100;
Alert.yesLabel = "Magenta";
Alert.noLabel = "Blue";
Alert.cancelLabel = "Green";
Alert.show("Select a color:", "Color Selection", Alert.YES|Alert.NO|Alert.CANCEL, this);
// Set the labels back to normal:
Alert.yesLabel = "Yes";
Alert.noLabel = "No";
}
]]>
</fx:Script>
<s:Panel title="Halo Alert Control Example"
width="75%"
horizontalCenter="0" verticalCenter="0">
<s:VGroup left="10" right="10" top="10" bottom="10">
<s:Label color="blue"
text="Click the button below to display a simple Alert window."/>
<s:Button label="Click Me" click="Alert.show('Hello World!', 'Message');"/>
<mx:HRule width="100%" />
<s:Label color="blue"
text="Click the button below to display an Alert window and capture the button pressed by the user."/>
<s:Button label="Click Me" click="clickHandler(event);"/>
<s:Label id="status" fontWeight="bold"/>
<mx:HRule width="100%" />
<s:Label color="blue"
text="Click the button below to display an Alert window that uses custom Button labels."/>
<s:Button label="Click Me" click="secondClickHandler(event);"/>
</s:VGroup>
</s:Panel>
</s:Application>