Hi, I have found that Matlab uses Boost libraries and maybe headers also. It's surprising since people often compare their legacy Matlab code and new C++ boostified code. There is no reference from Mathworks on "Who's using Boost". boost_date_time-vc80-mt-1_33_1.dll boost_filesystem-vc80-mt-1_33_1.dll boost_regex-vc80-mt-1_33_1.dll boost_serialization-vc80-mt-1_33_1.dll boost_signals-vc80-mt-1_33_1.dll boost_thread-vc80-mt-1_33_1.dll boost_wserialization-vc80-mt-1_33_1.dll See the directory MATLAB\R2007b\bin\win64. Elviin