The inactive scrollbar is for the internal Window. I have added "-vscroll => 1" to it, still it's inactive.

I suspect that you would need two things for it to become active (but I'm half-remembering/guessing here!):

1. The content of that inner window would need to be bigger than the client area.
2. You might well have to added a scroll handler.

   Something like:

   sub Inner_Scroll { ## assumes you've named your inner window 'Inner'.
       ## do stuff. You'll need to look up the details.
   }
   [download]

1. the contents of the internal window IS bigger then the windows, and would need scrolling ... 2.this sub - does not seem to do much - did I miss something ? "sub Inner_Scroll { ## assumes you've named your inner window 'Inner'. ## do stuff. You'll need to look up the details. }"