Copying text to the operating system clipboard in Flex

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/01/30/copying-text-to-the-operating-system-clipboard-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">
 
    <mx:Script>
        <![CDATA[
            import mx.controls.Alert;
 
            private function button_click():void {
                System.setClipboard(richTextEditor.text);
                Alert.show("Done");
            }
        ]]>
    </mx:Script>
 
    <mx:ApplicationControlBar dock="true">
        <mx:Button id="button"
                label="Copy text to clipboard"
                toolTip="Click here to copy the contents of the RichTextEditor control to the OS clipboard."
                click="button_click();" />
    </mx:ApplicationControlBar>
 
    <mx:RichTextEditor id="richTextEditor"
            text="The quick brown fox jumped over the lazy dog."
            width="100%"
            height="100%" />
 
</mx:Application>