I suppose I can say
if errorlevel 1 exit 0
Actually I want to exit 0 if the dll IS installed, so I guess I want
if errorlevel not 1 exit 0
if not errorlevel 1 exit 0
Actually, this doesn't help me, because the gacutil command always returns 0, since the command works whether the dll is installed or not.
I'm starting another thread with a question on how to use the output like we do in unix.