Try calling Update() after you set the text. eg.

   } else {
      $win-> reReport-> Text("Searching for media files ...");
      $win->reReport->Update;
   };
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You'll have to do the same thing after each update to the window because you are not allowing the code to return to the message loop. Ideally, you should hive long running (more 1/10th second) processing off into a separate thread, but that is probably overkill until you gain more experience with the GUI toolkit.