Hello,

you can run system on threads like this:

use threads;

my @thr = ();
for my $i (1..5) {
    push @thr, threads->create('run_command');
}
for my $t (@thr) { $t->join }

sub run_command {
    system("DoThis.exe");
}
[download]

Working with 5.10 on Windows.

-- Roman