If has already apparently for VC++. From the Scons main web page
(http://scons.tigris.org/) you can read this:
# Support for Microsoft Visual Studio .NET and 2005
Generates .dsp and .dsw files, or .sln and .vcproj files, from the same
build configuration used to build on all platforms. Allows Windows
developers to do all the productive point-and-click debugging they're
used to without having to maintain a separate build configuration just
for Windows.
I read that, and I find env.MSVSProject() in
http://www.scons.org/doc/HTML/scons-man.html, but my first step is
still the old command line way. That is to say, go to vc command
prompt,
scons -f development/scons/SConstruct use_vc=yes blah...
and compile lyx from command line.
Bo