Perhaps in the "non-Tk script" you can include an END{} block - something like:
END{$obj->Kill($exitcode) if $obj->GetExitCode() == STILL_ACTIVE};
For that to work you'll need to be using version 0.10 of Win32::Process and you'll need to load the module as:
use Win32::Process (STILL_ACTIVE);
Even with earlier versions of Win32::Process there's probably a way of doing it - assuming that the END{} block is the way to go - which I've not properly tested. In fact you might even find it sufficient to simply:
END{$obj->Kill($exitcode)};
which would work for earlier versions of Win32::Process, too.
Also check the syntax of the GetExitCode() call (if you find you need to use it). The docs have it written as
$ProcessObj->GetExitCode($exitcode);
but supplying an argument doesn't smell right to me.
Cheers,
Rob
