http://zlib.net/
zlib 1.2.8 is built with Visual Studio 2015. Both x86 and x64 versions should work.
INSTALL
- Download and unzip zlib-1.2.8.vs14.zip
- cd vs2015
- cmake_build_zlib.bat (Add x64 parameter to build 64bit version.)
- cd build
- Execute install.bat.