I know zip about MSVC, unfortunately. But that was the tips I found for compiling this on Windows. Yes, SYBASE is set along with

SYBASE=C:\sybase70
SYBASE_JRE=C:\sybase70\Shared\Sun\jre142
SYBASE_OCS=OCS-15_0
SYBASE_UA=C:\sybase70\ua
INCLUDE=C:\sybase70\OCS-15_0\include
LIB=C:\sybase70\OCS-15_0\lib
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Edit: g0n - code tags