Convert number to char from key code of KeyboardEvent

         
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
    creationComplete="init()">
    <mx:Script>
    import flash.events.KeyboardEvent;
    private function init():void {
        ti1.setFocus();
        this.addEventListener(KeyboardEvent.KEY_DOWN, trapKeys);
    }
    private function trapKeys(e:KeyboardEvent):void {
        l2.text = numToChar(e.keyCode) + " (" + String(e.keyCode) + ")";
    }
    private function numToChar(num:int):String {
        if (num > 47 && num < 58) {
            var strNums:String = "0123456789";
            return strNums.charAt(num - 48);
        } else if (num > 64 && num < 91) {
            var strCaps:String = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
            return strCaps.charAt(num - 65);
        } else if (num > 96 && num < 123) {
            var strLow:String = "abcdefghijklmnopqrstuvwxyz";
            return strLow.charAt(num - 97);
        } else {
            return num.toString();
        }
    }
  </mx:Script>
    <mx:TextInput width="50%" id="ti1" />
    <mx:Canvas id="mainCanvas" width="100%" height="100%">
        <mx:Form>
            <mx:FormItem label="Key (Code)">
                <mx:Label id="l2" />
            </mx:FormItem>
        </mx:Form>
    </mx:Canvas>
</mx:Application>

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Convert number to char from key code of KeyboardEvent : Key Event « Event « Flex

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