These are the changes that I did, and it seems to work (I do get and display and no errors)!

#! c:/perl/bin/perl.exe -slw
use strict;
use vars qw/%data/;

use Win32;
use Win32::NetAdmin qw(LoggedOnUsers);
use Win32::AdminMisc;

use CGI qw (:standard);

my $data{host} = param('hostname') || Win32::NodeName();
my $data{user} = Win32::AdminMisc::GetLogonName();
my $data{IP} = Win32::AdminMisc::GetHostAddress($data{host});

print "\n\nHello $data{user},...\n";
print "Remote Hostname is => $data{host}\n";
print "Remote TCP/IP Address is => $data{IP}\n";

my %user_ref;

LoggedOnUsers($data, \ %user_ref);

if (!%user_ref)
{
    print "\nOooops : ";
    print Win32::NetAdmin::GetError()."\n";
}
else
{
    while (my ($a, $b) = each %user_ref)
    {
        print "$a, $b\n";
    }    
}
[download]

The Output

Hello SYSTEM,...

Remote Hostname is => DNA001910

Remote TCP/IP Address is => 10.60.1.54

6, amy.miles;UK;GENRUNUDC02

3, Administrator;UK;GENRUNUDC02

7, Administrator;UK;GENRUNUDC02

9, Administrator;UK;GENRUNUDC02

2, Administrator;UK;GENRUNUDC02

8, claire.calway;UK;GENRUNUDC02

1, Administrator;UK;GENRUNUDC02

4, Administrator;UK;GENRUNUDC02

0, DNA001910$;CASH;

5, Administrator;UK;GENRUNUDC02
[download]

But I still have few questions?

1- is no 9 is the last person to login?

2-when I change the parameter in the URI the display doesn't change! i.e if I enter a URL http://localhost/cgi-bin/test.cgi?hostname=dna1111119 then I would get a display of some sort but if I change the hostname to something else, the display doesn't change!!!

3-do I need the line print "Content-Type: Text/Plain\n\n" in every CGI code! it seems if I omit this line my MS-IE browser throughs error 500!

Please enlighten me,.....Thanks indeed