Hi, First a confession: I am new to VC++ AND to BOOST...I thought the best way to learn both was to dive right in...and now I'm looking for a life-guard! OK, so here's the problem: I have installed the Boost Library in its default location (C:/Boost... ). When I try to compile the code random_demo.cpp (link to the code: http://www.boost.org/libs/random/random_demo.cpp), I get the following error: "fatal error C1083: Cannot open include file: 'boost/random/linear_congruential.hpp': No such file or directory Error executing cl.exe." Clicking on the error leads me to the following source of error in the code: #include <boost/random/linear_congruential.hpp> I have added the root Boost directory to the directory path: (tools>options>directories > I added C:\Boost there for "include files") So I am not sure why the compiler can't locate the file. Any help would be appreciated. Thanks, samvit