Selecting/Highlighting a file in a window

Hi,

I’m currently building an app in Adobe Air 2.6. I use this line of code:

var url:String = "C:\Workspace";

var ff:File = new File( url );
ff.openWithDefaultApplication();

Which opens up the directory in a new window, However, say I have the name of a file in that directory… How do I make the window open and highlight/select the file?

Any ideas?