I learned recently that Windows has system error codes for process errors: https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes--0-499- https

I learned recently that Windows has system error codes for process errors: https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes--0-499- https://docs.microsoft.com/en-us/windows/win32/debug/system-... A coworker mentioned that programs should return internal state information using codes < 0, but I have not fact checked that.