Error: Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)

[Rizwan Syed]

OS: Microsoft Windows 10 Pro

When running 

```

 C:\Path\to\protobuf\cmake\build>mkdir release & cd release

 C:\Path\to\protobuf\cmake\build\release>cmake -G "NMake Makefiles" ^

 -DCMAKE_BUILD_TYPE=Release ^

 -DCMAKE_INSTALL_PREFIX=../../../../install ^

 ../..

```

in `protobuf-3.17.3\cmake\build\release>` via the MSVC Developer Command Prompt the following error is outputted: 

`Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)`

I am running this inside the unzipped "protobuf-cpp-3.17.3.tar.gz"  file. 

I am following the instructions at protobuf/README.md at master · protocolbuffers/protobuf (github.com)  under the subheading "CMake Configuration".

I am following them from top to bottom, so I haven't built the solution file ` protobuf.sln ` yet.

Does anyone know of any solutions for this problem? 

Thanks