Development Flash ActionScript

package {
    import flash.display.Sprite;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.events.Event;
    import flash.printing.PrintJob;
     
         public class Main extends Sprite {
     
             private var _printableContent:Sprite = new Sprite();
             private var _textField:TextField = new TextField();
     
             private var _loader:URLLoader = new URLLoader();
     
             public function Main() {
                 _loader.load(new URLRequest("http://www.rntsoft.com/m.txt"));
                 _loader.addEventListener(Event.COMPLETE, completeHandler);
     
                 _textField.width = 400;
                 _textField.multiline = true;
                 _textField.wordWrap = true;
                 _textField.autoSize = TextFieldAutoSize.LEFT;
     
                 addChild(_printableContent);
                 _printableContent.addChild(_textField);
             }
     
             private function completeHandler(event:Event):void {
     
                 _textField.text = _loader.data;
     
                 var printJob:PrintJob = new PrintJob();
                 if(printJob.start()) {
     
                     _textField.scaleY = printJob.pageHeight / _textField.height;
                     _textField.scaleX = _textField.scaleY;
                     printJob.addPage(_printableContent);
                     printJob.send();
     
                     _textField.scaleY = 1;
                     _textField.scaleX = 1;
                 }
             }
         }
     }