Thank you all for your help so far. For now I have sttlled on something like:

do{
    $create = -C "test1.jpg";
    $modify = -M "test1.jpg";
}until ($create == $modify and $create > 0);

# Then process file or whatever.....
[download]

I tried several things such as code I found here at the monestary to monitor the windows process list like so:

use Win32::PerfLib;
sub get_remote_process_list {
    my $server = $_[0];
        my %rtasks;
    my %counter;
    Win32::PerfLib::GetCounterNames($server, \%counter);
    my %r_counter = map { $counter{$_} => $_ } keys %counter;
    my $process_obj = $r_counter{Process};
    my $process_id = $r_counter{'ID Process'};
    my $perflib = new Win32::PerfLib($server);
    my $proc_ref = {};
    $perflib->GetObjectList($process_obj, $proc_ref);
    $perflib->Close();
    my $instance_ref = $proc_ref->{Objects}->{$process_obj}->{Instance
+s};
    foreach my $p (sort keys %{$instance_ref}){
        my $counter_ref = $instance_ref->{$p}->{Counters};
        foreach my $i (keys %{$counter_ref}){
            if($counter_ref->{$i}->{CounterNameTitleIndex} == $process
+_id){
                print "$instance_ref->{$p}->{Name}  ";
                $rtasks{$counter_ref->{$i}->{Counter}} = $instance_ref
+->{$p}->{Name};
            }
        }
    }
      return %rtasks;
}
[download]

But I never saw a new Process appear in the list when someone was uploading so I had no idea what to monitor. Btw, I am testing this on my local network using WSFTP to send a file to a second computer. I also tried something like:

use Win32::Process;
use Win32;

sub ErrorReport{
    print Win32::FormatMessage( Win32::GetLastError() );
}

Win32::Process::Create($ProcessObj,
            "C:/WINNT/system32/CMD.EXE",                    "dir", # p
+rint dir just to see if I can do anything at all
            0,
            CREATE_NEW_CONSOLE,
            ".")|| die ErrorReport();
$ProcessObj->Wait(INFINITE);
[download]

because the shell acting like I wanted as far as renaming went, but I never could sent any commands to the new "Dos" window. frustrating......