You'd get that error if Perl was unable to find the Win32::EventLog class at runtime. E.g. if you create a script containing only the following, you can reproduce the error;

my $handle = Win32::EventLog->new("Application", $ENV{ComputerName});
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ActivePerl doesn't seem come with Win32::EventLog by default - I just had to install in manually.

You can check whether it's installed by looking for the file;

C:\Perl\site\lib\Win32\EventLog.pm
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(Assuming you installed ActivePerl to C:\Perl). The C:\Perl\site directory is where additional libraries, e.g. from CPAN, get installed while C:\Perl\lib is where the default libraries, bundled with Perl, are installed.

If it's not there, you'd need to install it - from the command line you start the ActiveState package manager then install the Win32::EventLogs;

C:\> ppm
ppm> install Win32::EventLog
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I assume you're not behind a proxy server. If you are you'd first need to setup your proxy environment in DOS, before running the above commands e.g.;

REM proxy.bat - set's up proxy environment vars
@echo off
set HTTP_proxy=http://your.company.proxy.com:8080/
set HTTP_proxy_user=user
set HTTP_proxy_pass=passwd
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If Win32::EventLog is installed, then you need to check you have the correct use statement at the start of the script;

use strict;
use Win32::EventLog;
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If Perl can't find it in it's library paths, it should raise an error at this point e.g.

Can't locate Win32/EventLog.pm in @INC (@INC contains: c:/Perl/lib c:/
+Perl/site/lib .) at print_log.pl line 2.
BEGIN failed--compilation aborted at print_.pl line 2.
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If you get that, run the following and post it here;

use Data::Dumper;
print Dumper(@INC);
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For a standard ActivePerl install you should see;

$VAR1 = 'c:/Perl/lib';
$VAR2 = 'c:/Perl/site/lib';
$VAR3 = '.';
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Are you sure you have a use Win32::EventLog; in the program file you are trying to use the module in?

use strict;
use Win32::OLE;

my $w = Win32::OLE->GetObject("winmgmts:");
die "failed to get obj\n" if !defined $w;

my $q = $w->ExecQuery(qq(SELECT * FROM Win32_NTLogEvent where Logfile=
+"SYSTEM"));
die "failed to create query\n" if !defined $q;

my @t = qw(Error Warning Information SecurityAuditSuccess SecurityAudi
+tFailure);

foreach my $r (sort {$a->RecordNumber > $b->RecordNumber} in $q) {
    print
        join(',' , 
            $r->TimeWritten, 
            $t[$r->EventType - 1], 
            @$r{"ComputerName", "SourceName", "EventCode"}, 
            substr($r->Message, 0, -3)
         )."\n";
}
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Another option for you may be to use a different module. I would recommend that you take a look at http://www.cpan.org/modules/by-authors/id/H/HC/HCARVEY/.

This module bypasses the Windows API and reads the event log directly, which is quite useful where the Windows API cannot read the event log or thinks there is a problem with some event log entries.