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I just got the 7.1 version of the microsoft compiler and
read over the code jhylton submitted and it looks like there
is a problem with  get_msvc_paths, which hard codes the
registry path:

..\7.0\VC\VC_OBJECTS_PLATFORM_INFO\Win32\Directories

it needs to be:
..\7.1\VC\VC_OBJECTS_PLATFORM_INFO\Win32\Directories

for the 7.1 compiler.

Although, there may be other problems with 7.1, I suspect
they are minor, so it would probably be pretty easy to
include minor changes to support 7.1