MSVC_VERSION ------------ The version of Microsoft Visual C/C++ being used if any. Known version numbers are:: 1200 = VS 6.0 1300 = VS 7.0 1310 = VS 7.1 1400 = VS 8.0 1500 = VS 9.0 1600 = VS 10.0 1700 = VS 11.0 1800 = VS 12.0 1900 = VS 14.0 1910 = VS 15.0