In version 0.10.0 all windows project files were removed from the repository.
The apr project which log4cxx depends on provides both a static project file (which I would discourage) as well as a cmake build environment for windows (which can generate a solution for any version of Visual Studio).
The improvement request is to provide a cmake build environment for log4cxx.
I believe it would be acceptable to tie this to the apr-2 project, given that apr-util folded into apr about 5 years ago... when will apr-2 be released?
The web site documentation for building on Visual Studio is ancient (10+ years old):
This should also be updated.