Passing commands to a running process

Passing commands to a running process

After looking for a couple of hours, I decided it's time to ask for some
help. I have a local server of an online game, which has its own command
line where the admin can execute different commands, like /kickuid x
(which kicks the user with the useruid = x) and many other commands.
Here's a screenshot of how it looks like:

I am interested in automatically executed commands, but the problem is
that I have no idea of how I could pass a command to the game service
through cmd.
I would be very grateful if somebody knows how to(assuming that it's
possible) send commands to a running process through cmd or maybe in
another way.