Your code doesn't compile, but this works for me on both linux and windows (5.12): 
use warnings;
use strict;
use Getopt::Long;

my $out_dir;
GetOptions('outdir=s' => \$out_dir);
print "$out_dir\n";

__END__

perl script.pl --outdir "D:\My-Folder"
D:\My-Folder

[download]

Perhaps there is some shell quoting problem.

In reply to Re: Parameters and Dashes by toolic
in thread Parameters and Dashes by Elegant

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