Cross posted at StackOverflow. When you cross-post on numerous sites, please let all sites know you're doing so, as to not waste people's time working on a solution when one could already be located somewhere else.
Here's a very simple example from my SO answer. It requires only a single use statement (you'll have to install Tk first, of course), and one line of code. It's also cross-platform:
use warnings;
use strict;
use Tk;
my $file = Tk::MainWindow->new->getOpenFile;
print "selected file: $file\n\n";
open my $fh, '<', $file or die $!;
while (<$fh>){
print;
}
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