windos% perl -Mv5.20 -Mstrict -MConfig -w -e "say $Config{versiononly}" 

##</code><code>##

#!perl 

use 5.20;
use strict;
use warnings;
use Config qw/config_sh/;

open my $fh, '>', '.\configlist.txt' or die $!;
print {$fh} config_sh(); 
close $fh;

##</code><code>##

windos% perldoc -D   # or
windos% set PERLDOCDEBUG=9  # 0..9