frameworks/projects/spark/asdoc/en_US/spark/components/examples/ButtonExample.mxml

<?xml version="1.0"?>
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  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

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  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

-->
<!-- Simple example to demonstrate the Spark Button 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 flash.events.Event;

            // Event handler function to print a message
            // describing the selected Spark Button control.
            private function printMessage(event:Event):void  {
                message.text += event.target.label + " pressed" + "\n";
            }

        ]]>
    </fx:Script>

    <s:Panel title="Spark Button Control Example"
            width="75%" height="75%"
            horizontalCenter="0" verticalCenter="0">
        <s:VGroup left="10" right="10" top="10" bottom="10">
            <s:VGroup width="100%">
                <s:Button label="Default Button" click="printMessage(event);"/>
                <s:Button label="autoRepeat Button" buttonDown="printMessage(event);"
                        autoRepeat="true"/>
                <s:Button label="Disabled Button" enabled="false"
                        click="printMessage(event);"/>
            </s:VGroup>
            <s:TextArea x="80" y="0" id="message" height="100%" width="100%"
                color="#0000FF"/>
        </s:VGroup>
    </s:Panel>

</s:Application>