China DOS Union

I'm using WBAT for batch processing. One of the options is "0, Exit", but when I use
"if errorlevel 0 goto end" it just won't jump to ":END". If I change it to some other number, it will jump. I don't know why. Please advise, experts. Thanks!

Try changing if errorlevel 0 goto end to if not errorlevel 1 goto end.

This just solved one of my problems. Thank you very much!

In Mini WIN32, when exiting at the end there is an option:
%drive%\boot\boot\win32\wbat box "Save the system settings to the disk?",Yes,No #1,5
if errorlevel 2 if not errorlevel 3 %drive%\boot\boot\win32\win.bat _quit_
goto continue
Question: if I want the default to be not save, how should I change that ERRORLEVEL line?