This SourceForge project, evolution-win32, was created with the intent of being "the" place where the porting of Evolution to Windows happens. Alas, that wasn't how it worked out. The porting work, mostly done by Tor Lillqvist at Novell, had all required changes folded into the normal GNOME source code repositories, and binaries were released on ftp.gnome.org.
There has been a sad lack of volunteers helping with the porting work. Volunteer help would be much needed to sort out the remaining issues. Probably an effort will be made to make the Evolution code (and maybe parts of the dependencies, too) easily compilable with Visual Studio. The GNU style build system with configure scripts, makefiles and libtool is probably a large stumbling block for people who might otherwise be interested in helping.
There has been a sad lack of volunteers helping with the porting work. Volunteer help would be much needed to sort out the remaining issues. Probably an effort will be made to make the Evolution code (and maybe parts of the dependencies, too) easily compilable with Visual Studio. The GNU style build system with configure scripts, makefiles and libtool is probably a large stumbling block for people who might otherwise be interested in helping.