Step 1.  修改配置檔案 (例如：MyApplication-app.xml)

    1.1 <systemChrome>none</systemChrome>    ==>表示沒有系統視窗
    1.2<transparent>true</transparent>                ==>表示開啟背景透明
 

<?xml version="1.0" encoding="UTF-8"?> <application xmlns="http://ns.adobe.com/air/application/1.5"> ... <initialWindow> <systemChrome>none</systemChrome> <transparent>true</transparent> </initialWindow> ... </application>

Step 2.  修改 mx:WindowedApplication 的 .mxml檔案 (例如：MyApplication.mxml)

    2.1 showFlexChrome="false"
    2.2 alwaysInFront="true"

    2.3 layout="absolute"

<?xml version="1.0" encoding="utf-8"?> <mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" showFlexChrome="false" alwaysInFront="true" layout="absolute" width="314" height="460" > </mx:WindowedApplication>