#!/usr/bin/perl -w

use Win32::Registry;

$key_name = "SOFTWARE\\YourKey";

$status = $HKEY_LOCAL_MACHINE->Create( $key_name, $keyobj );

if ($status) {

    $keyobj->SetValueEx( 'Value',  # Name
        0,        # Reserved. 
        REG_SZ,   # Type
        'Comments' );


    $keyobj->Close();
}