Tk and fileevent is a recurring problem. MS Windows makes it more complex. I started using Tkx but gave up. I have code that seems to work fine on Linux, but fails on MS Windows (Activestate Perl 5.8.9). I attach the simplest server and client. Can someone show me how to make a working MS Windows version? The version shown here freezes during processing of the first client data (I think at the end of sub new_connection).

This code works on Linux (at least on my system)

taken from http://www.perlmonks.org/?node_id=546243
Updated after the first 3 replies, using:
http://code.activestate.com/lists/perl-tk/%3c3A9D513E.CF3B9466@lehigh.
+edu%3e/
(this example is about a client, not a server)

#!/usr/bin/perl
use strict;
use warnings;
use IO::Socket;
use Tk;

$| = 1;
$SIG{PIPE} = 'IGNORE';

my $listen = IO::Socket::INET->new(
    Proto     => 'tcp',
    LocalPort => 7777,
    Listen    => 1,
    Reuse     => 1,
) or die "Can't create listen socket : $!\n";

my $mw = MainWindow->new();

my $text = $mw->Scrolled( 'Text', )->pack();

my ($sel);
if ( $^O eq 'MSWin32' ) {
    $mw->repeat( 50 => [ \&new_connection, $listen ] );
}
else {
    $mw->fileevent( $listen, 'readable' => [ \&new_connection, $listen
+ ] );
}

Tk::MainLoop;

sub new_connection {
    my ($listen) = shift;
    my ($sel);
    my $client = $listen->accept() or warn "Can't accept connection";
    $client->autoflush(1);
    if ( $^O eq 'MSWin32' ) {
        use IO::Select;
        $sel = IO::Select->new; 
        $sel->add($listen); #<<===== $sel problem??
        $mw->repeat( 50 => [ \&handle_connection, $client, $sel ] );
    }
    else {
        $mw->fileevent( $client,
            'readable' => [ \&handle_connection, $client, $sel ] );
    }

    $text->insert( 'end', "Connected\t" );
    $text->see('end');
}

sub handle_connection {
    my ( $client, $sel ) = shift;
    if ( $^O eq 'MSWin32' ) {
        my (@ready) = $sel->can_read(0);
        return if $#ready == -1;
        $client = $ready[0];
    }
    my $message = <$client>;
    if ( defined $message and $message !~ /^quit/ ) {
        $message =~ s/[\r\n]+$//;
        $text->insert( 'end', "Got message [$message]\t" );
        $text->see('end');
    }
    else {
        $text->insert( 'end', "Connection Closed\n" );
        $text->see('end');
        $client->close();
    }
}
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#!/usr/bin/perl
use IO::Socket;
my $machine_addr = 'localhost';
$sock = new IO::Socket::INET(PeerAddr=>$machine_addr,
      PeerPort=>7777,
      Proto=>'tcp',
      );
die "Could not connect: $!" unless $sock;

foreach my $count(1..100){
  print $sock "$count\n"; print "$count";
}
close ($sock);
[download]