Thank you.
The build script compiles shared/dynamic libraries for Linux and OSX. There is no Windows support yet. You can build or use the source code any way you want of-course.
Though cbitcoin will likely not be windows friendly. It would be good for any Windows developers to see if they can get it to work in Windows. I understand that the Windows C compiler doesn't support C99 so that will be a problem, though the code can be modified for C89 to compile for Windows or some other compiler can be used if it exists.