c:\test>type junk.bat
set test1=this persists
setlocal
set test2=this does not persist
endlocal
set test3=and this persists also

c:\test>set | find "test"
c:\test>junk
c:\test>set test1=this persists
c:\test>setlocal
c:\test>set test2=this does not persist
c:\test>endlocal
c:\test>set test3=and this persists also

c:\test>set | find "test"
test1=this persists
test3=and this persists also