I already answered you in the newsgroups.

1. You cannot spawn a thread from a Tk Button callback.

2. You cannot access a Tk widget from a thread.

Here is some code to show you how to use shared variables and Tk with threads. I don't use win32, so OLE stuff is left out and may be a bigger problem yet.

#!/usr/bin/perl
use strict;
use warnings;
use Tk;
use threads;
use threads::shared;

my $data:shared = '';
my $go_control:shared = 0;
my $die_control:shared = 0;

#create thread before any Tk
my $thr = threads->new(\&excecute);


my $mainWindow = MainWindow->new;

my $textBox = $mainWindow->Scrolled("Text", -width=>80, -height=>7,
      -scrollbars=>"ose", -wrap=>"word")->pack();

my $goBut; # need to declare here so can be used in -command
$goBut = $mainWindow->Button(-foreground=>"blue", -text=>"Click",
                   -command=>sub { $goBut->configure(-state=>"disabled
+");
                               $textBox->configure(-state=>"normal");
                   $go_control = 1; #start thread
                   } )->pack();

my $stopBut = $mainWindow->Button(-foreground=>"red", -text=>"Exit",
                   -command=>sub{  $die_control = 1;
                   $thr->join;    
                   exit;
                   })->pack();

#use a timer to read the shared variable and deal with Tk stuff

my $repeater = $mainWindow->repeat(20,sub{
                
                $textBox->insert('end',$data);
                $textBox->see('end');


             });


MainLoop;


sub excecute{
   
#   require Win32::OLE;
#   require Win32::OLE::Const 'Microsoft Excel';
   
   while(1){
      
      #wait for $go_control  
      if($go_control){      
           open(FILE,$0 ) or die "Can't open file.\n";
             while(<FILE>){
              if($die_control){return} 
              $data = $_;
         }
       close(FILE);
     }else{ select(undef,undef,undef,.25); }# sleep until awakened 
   }
    
return;
}
[download]

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.