How to send a command to press a key on a specific schedule to the program?

Question

Programming

It is necessary to send a command to press a certain key from the F1 ... F11 series to a specific running program on Windows according to a specific schedule.
In manual mode, the scheme is as follows: I pressed a key on the keyboard - a certain process started in the program, I pressed it again - this certain process stopped, so according to a certain schedule.
The essence of the task is to automate pressing the desired key instead of the PC operator.
How can this be implemented? Maybe there is already something that could be sharpened for this task?
I feel that the matter may result in programming in some language, but I am not strong in this.

Answer 1

https://ru.wikipedia.org/wiki/AutoHotkey

Answer 2

FindWindow + SendMessage and all this on a timer in a separate program, for example.