How do time tracking softwares find screen time of applications?

Question

I wanted to write a time tracking software using python for windows. How do I approach finding the total screen time of individual applications? Is there any windows service which tracks the total on screen time spent by a particular application during its current session? Or is there some other approach which could be used?

Answer 1

maybe pywin32 is what you looking for:

from win32gui import GetWindowText, GetForegroundWindow
print(GetWindowText(GetForegroundWindow()))

you have to run in repeatedly in the background and calculate the total screen time by yourself.