How about having it read everything you copy to the clipboard! Just start this, then minimize the window. Any text you copy will be read out loud.

#!/usr/bin/perl

use warnings;
use strict;
use Win32::Clipboard;
use Win32::OLE;

my $cb = Win32::Clipboard;
my $voice = Win32::OLE->new("Speech.VoiceText") or die("TTS failed");
$voice->Register("", "$0"); 
$voice->{Enabled} = 1;
$voice->{Speed}=180;
$cb->Empty();

sub say {
    my $text = shift;    
    $voice->speak($text, 1);
    sleep 1 while $voice->IsSpeaking;
}

say <<SPEAK;
Copy some text, and I will read it to you.
Hit Control C to stop.
SPEAK

while (1) {
    my $text = $cb->GetText();
    next unless length $text;
    say $text;
    $cb->WaitForChange;
}
[download]

I left this running when I copied the code to paste here - MS TTS doesn't read perl the way I do ;-)

Oh, and once it starts speaking, it won't stop until it is done.