How do I convert UNIX path to DOS path

Question

Need a regex or some other method to convert UNIX path to DOS path.

I have

C:/My Document/Photo.gif

Need

C:\My Document\Photo.gif

Answer 1

#!/usr/bin/perl

use strict; use warnings;
use File::Spec::Win32;

print File::Spec::Win32->canonpath('C:/My Document/Photo.gif'), "\n";

Answer 2

This is the regular expression

s/\//\\/g