How do you stop a windows program started with system exec?

[Jon Sweeney / ATS]

What is the accepted method to terminate an application started with System
Exec if it doesn't terminate itself ? (from LabVIEW of course).
I am calling System Exec with "Wait for Completion"=F so that I can do a
timeout polling, and would like to stop the application after a certain
number of seconds or if a certain file gets too large, especially because
under some error conditions it starts to consume memory resources quickly.
(Using Windows XP and LabVIEW 6.0.2)

Thanks,
Jon