Using a service with binding, validation, and event listeners

<?xml version="1.0"?>
<!-- fds\rpc\RPCBindValidateEvents.mxml. Compiles w destination error --> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
    width="600" height="400">

    <!-- WebService component handles web service requests and results. --> 
    <mx:WebService id="WeatherService" destination="wsDest">
        <mx:operation name="GetWeather"
            fault="showErrorDialog(event.fault.faultString)" result="log();">

    <!-- The mx:request data model stores web service request data. --> 
            <mx:request>
                <ZipCode>{myZipField.text}</ZipCode>
            </mx:request>
        </mx:operation>
    </mx:WebService>

    <!-- Validator validates ZIP code using the standard Zip Code validator. --> 
    <mx:ZipCodeValidator
        source="{WeatherService.GetWeather.request}" property="ZipCode"
        trigger="{mybutton}" triggerEvent="click"/>
    <mx:VBox>
    <mx:TextInput id="myZipField" text="enter zip" width="80"/>

    <!-- Button triggers service request. --> 
    <mx:Button id="mybutton" label="Get Weather"
        click="WeatherService.GetWeather.send();"/>

    <!-- TextArea control displays the results that the service returns. --> 
        <mx:TextArea id="temp" text="The current temperature in 
        {WeatherService.GetWeather.lastResult.CityShortName} is
        {WeatherService.GetWeather.lastResult.CurrentTemp}."
        height="30" width="200"/>
    </mx:VBox>
    <mx:Script>
        <![CDATA[
            public function log():void {
                // function implementation
            }

            public function showErrorDialog(error:String):void {
                // function implementation
            }
        ]]>
    </mx:Script>
</mx:Application>