<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/02/20/disabling-user-input-in-a-flex-application/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white" viewSourceURL="srcview/index.html">

    <mx:Script>
        <![CDATA[
            private function disableApplication():void {
                Application.application.enabled = false;
                btn.enabled = false;
                setTimeout(enableApplication, 3000);
            }

            private function enableApplication():void {
                btn.enabled = true;
                Application.application.enabled = true;
            }
        ]]>
    </mx:Script>

    <mx:Array id="arr">
        <mx:Object product="Flex" version="3" />
        <mx:Object product="Flash" version="CS3" />
        <mx:Object product="Dreamweaver" version="CS3" />
        <mx:Object product="Fireworks" version="CS3" />
        <mx:Object product="Photoshop" version="CS3" />
        <mx:Object product="Illustrator" version="CS3" />
    </mx:Array>

    <mx:ApplicationControlBar dock="true">
        <mx:Button id="btn"
                label="Disable Application (3 seconds)"
                emphasized="true"
                click="disableApplication();" />
    </mx:ApplicationControlBar>

    <mx:DataGrid id="dataGrid" dataProvider="{arr}">
        <mx:columns>
            <mx:DataGridColumn dataField="product"
                    headerText="Product:" />
            <mx:DataGridColumn dataField="version"
                    headerText="Version:" />
        </mx:columns>
    </mx:DataGrid>

</mx:Application>