The following code snippett should give you the right idea: 
use strict;
use warnings;
use use Win32::TieRegistry ( Delimiter => "/", ArrayValues => 1 );

my $rootkey = "LMachine/Software/Microsoft/Windows NT/CurrentVersion/W
+inlogon";
$Registry->{"$rootkey//testkey"} = "foobar";

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In reply to Re^2: How to create new DWORD value in Windows Registry? by puploki
in thread How to create new DWORD value in Windows Registry? by vios

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