I am using Boost 1.33.0 and MS Visual Studio .NET 2003 (13.10.3077) and having trouble developing a simple Win32 console application that accepts case-insensitive command-line options. -- output ---------------------------------- ..\>app -n 2 BOOST_PROGRAM_OPTIONS_VERSION=2 count set to 2 ..\>app -N 2 BOOST_PROGRAM_OPTIONS_VERSION=2 Exception caught: unknown option -N -------------------------------------------- -- code ------------------------------------ #include int _tmain(int argc, _TCHAR* argv[]) { using std::cout; using std::endl; namespace po = boost::program_options; namespace cls = boost::program_options::command_line_style; int count = 0; cout << "BOOST_PROGRAM_OPTIONS_VERSION=" << BOOST_PROGRAM_OPTIONS_VERSION << endl; try { po::options_description desc("Usage"); desc.add_options() ("help,h", "produce help message") ("count,n", po::value<int>(&count), "repeat count") ; po::variables_map vm; int cl_style = 0; cl_style |= cls::allow_short; cl_style |= cls::allow_dash_for_short; cl_style |= cls::short_allow_next; cl_style |= cls::case_insensitive; po::store(po::command_line_parser(argc, argv).options(desc).style(cl_style).run(), vm); po::notify(vm); if (vm.count("count")) cout << "count set to " << count << endl; else cout << "count not set" << endl; } catch( exception &e ) { cout << "Exception caught:\t" << e.what() << endl; } catch(...) { cout << "Unhandled exception caught!" << endl; } } -------------------------------------------- The line "cl_style |= cls::case_insensitive;" seems to have no effect. The other options in that section do seem to work as I can create other errors by omitting others. I tried for a minimal set of styles. Any ideas what I'm doing wrong? Thanks. Brian Lawry Mfg Software Engineer Compressor Controls Corp blawrycccglobal.com