How to know when and exe is done running

I am making a program that runs an .exe program to update an another program. I am using shell to run the .exe update and I need to know when it is done running so I can continue. The program that updates does not show up on the task bar but does show up in the task manager. What can I use to know when the update is complete?

Thanks

Take a look at this tip.

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Marty
COGITO EGGO SUM
I think; therefore I am a waffle.

Thank You!!!!!!!!
:D