How to control mobile softkeys from Flash application embedded in HTML

var myListener = new Object();
myListener.onKeyDown = function() {
    var code = Key.getCode();
    if (code==ExtendedKey.SOFT1) {
        trace("I got a soft key event");
    }
}
Key.addListener(myListener);

trace(System.capabilities.hasMappableSoftKeys);
trace(System.capabilities.softKeyCount);