在exe中实现File下载

在exe 中实现File 下载

怎样在exe中实现File下载？
代码如下:
package {
    import flash.display.Sprite;
    import flash.events.*;
    import flash.net.FileReference;
    import flash.net.URLRequest;
    public class FileReference_download extends Sprite {
        private var downloadURL:URLRequest;
        private var fileName:String = "SomeFile.mp3";
        private var file:FileReference;
        public function FileReference_download() {
            downloadURL = new URLRequest();
            downloadURL.url = "http://localhost/SomeFile.mp3";
            file = new FileReference();
            file.download(downloadURL, fileName);
        }
    }
}