Hi, I have a few questions about Boost.ProgramOptions pertaining to parsing an argv that is of wchar_t data type. The first thing that isn't clear from the examples is whether it's possible at all. The second thing that isn't clear is how to do it and store string values in std::wstring variables. Here are the specifics: 1) How do you use program_options with an argv argument that is a wchar_t data type? Like this? variables_map vm; store(parse_command_line<wchar_t>(argc, argv, desc), vm); but then the question is how do you store any of the command line values in wstring variables? Like this? options_description desc("allowed options"); desc.add_options() // First parameter describes option name/short name // The second is parameter to option // The third is description ("help,h", "print usage message") ("validate,v", value(&strFile), "validate xml file"); // strFile is a wstring Well that doesn't work. 2) I am getting 3 link errors when trying the above: ToolsTest.obj : error LNK2019: unresolved external symbol "void __cdecl boost::program_options::store(class boost::program_options::basic_parsed_options<unsigned short> const &,class boost::program_options::variables_map &)" (?store@program_options@boost@@YAXABV?$basic_parsed_options@G@12@AAVvari ables_map@12@@Z) referenced in function _main ToolsTest.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::program_options::basic_parsed_options<unsigned short>::basic_parsed_options<unsigned short>(class boost::program_options::basic_parsed_options<char> const &)" (??0?$basic_parsed_options@G@program_options@boost@@QAE@ABV?$basic_parse d_options@D@12@@Z) referenced in function "public: class boost::program_options::basic_parsed_options<unsigned short> __thiscall boost::program_options::basic_command_line_parser<unsigned short>::run(void)const " (?run@?$basic_command_line_parser@G@program_options@boost@@QBE?AV?$basic _parsed_options@G@23@XZ) ToolsTest.obj : error LNK2019: unresolved external symbol "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl boost::program_options::to_internal(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?to_internal@program_options@boost@@YA?AV?$basic_string@DU?$char_traits @D@std@@V?$allocator@D@2@@std@@ABV?$basic_string@GU?$char_traits@G@std@@ V?$allocator@G@2@@4@@Z) referenced in function "class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > __cdecl boost::program_options::to_internal<class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > >(class std::vector<class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> >,class std::allocator<class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > > > const &)" (??$to_internal@V?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@ @std@@@program_options@boost@@YA?AV?$vector@V?$basic_string@DU?$char_tra its@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_ traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@ABV?$vector@V?$basic_strin g@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@V?$allocator@V?$basic_st ring@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@2@@3@@Z) Thanks for any help here, Elisha Berns e.berns@computer.org tel. (310) 556 - 8332 fax (310) 556 - 2839