Creating a Hidden File Using Flex / AIR on Win

Removed to better reflect where we are and will update it:

Based on information from: http://deepanjandas.wordpress.com/2010/09/10/writing-executing-cmd-scripts-through-air/

private var applicationDirectory:File;

private function createCMDFile():void
{
    applicationDirectory = File.desktopDirectory;
    var cmdFile:File = applicationDirectory.resolvePath( 'hide.cmd' );
    var stream:FileStream = new FileStream()
    stream.open( cmdFile, FileMode.WRITE );

    var dataString:String = "ATTRIB +H \\ C:\\Users\\***yourUserName***\\***fileToHide.txt***"; //or any path you want just be sure to use \\ instead of \ and obviously change ***yourUserName*** and ***fileToHide.txt***

            stream.writeMultiByte( dataString, "ANSI" );
    stream.close();

    stream = null;

    var nativeProcessStartupInfo:NativeProcessStartupInfo = new NativeProcessStartupInfo();
    nativeProcessStartupInfo.executable = cmdFile;

    var process:NativeProcess = new NativeProcess();
    process.start(nativeProcessStartupInfo);
    process.addEventListener( NativeProcessExitEvent.EXIT, onExitHandler );
}

private function onExitHandler( event:NativeProcessExitEvent ):void
{
    var cmdFile:File = applicationDirectory.resolvePath( 'hide.cmd' );
    cmdFile.deleteFile();
}