Positioning a widget

I want to place a widget at a particular position on the screen.  Using
Mastering Perl Tk I used iconposition as below (although the text sort
of hinted, with its reference to X Windows, that it was for UNIX only).
I am using Perl/Tk on Windows XP.
 
            $toplevel{$basic_gui}->iconposition(10,10);
            $toplevel{$basic_gui}->stayOnTop();
 
However, it did not seem to have any effect (the widget is a dialog
box).
 
Should this have worked?  If not is there a way of forcing a widget to
be at a particular position?
 
Best regards
 
Henry Merryweather