Pausing a Process in Windows

[Aaron Griffith]

Hi. I'm semi-new to python and was wondering if you could help me out.

I'm trying to design a program that will start rendering an image with
a raytracer. I want to be able to pause the raytracing, exit the
program that started the raytracer, and restart the program, using the
same paused process as before. I figured I'd save th PID in a file,
but I don't know how to pause a process in windows. Thanks in advance!