[Boost-users] On Windows, how does Boost decide which MSVS version to use, if I have more than one installed?

When I tried to build some app, I ended up with this error message: 1>LINK : fatal error LNK1104: cannot open file 'libboost_filesystem-vc80-mt-1_51.lib' I am sure it is due to the fact that I have a couple of Boost installations and 2 Versions of MSVS as well (2005 and 2010). NB: This is the way I build Boost on Windows: .\bootstrap.bat .\bjam.exe --with-date_time --with-filesystem --with-regex --with-system --stagedir=. --build-type=complete toolset=msvc The question is about that last parameter above. Does the install procedure: (a) Go to "Program Files" and takes a look at the name of the highest numbered MSVS folder? or (b) Is this info extracted from the Registry or something? TIA, -Ramon