How to check if the Adobe security panel is closed

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// This code checks one time if the security panel is closed.
// When you open the security panel, you should run this test
// repeatedly with a timer (every 500ms seems to work well).
// If the security panel is closed, you can then clean up your timers
protected function securityPanelIsClosed():Boolean
{
    // Why not just wait for an event from the SettingsPanel to know that it's closed?  Because there isn't one.
    // See http://bugs.adobe.com/jira/browse/FP-41
    var closed:Boolean = true;
    var hack:BitmapData = new BitmapData(1,1);  
    try 
    { 
        // Trying to capture the stage triggers a Security error when the settings dialog box is open. 
        hack.draw(stage); 
    } 
    catch (error:Error) 
    { 
        closed = false; 
    }
    hack.dispose(); 
    hack = null;
    return (closed);			
}