Hi, I'm trying to compile my project in MS Visual Studio 2008 with UNICODE and _UNICODE symbols defined. This automatically makes std::string resolve to std::wstring. I'm having a problem compiling exception/get_error_info.hpp because of the following code struct strwrap { std::string str; char const * ptr; explicit strwrap( char const * s ): str(s), ptr(&str[0]) { } Error messages quite predictably say about type inconsistency, there's a copy of them below my signature. Is there a known way to tweak boost to build seamlessly with Visual Studio Unicode projects? WBR Oleg V. Zhylin ovz@yahoo.com g:\Program Files\boost\boost_1_38\boost\exception\get_error_info.hpp(30) : error C2664: 'std::basic_string<_Elem,_Traits,_Ax>::basic_string(const std::basic_string<_Elem,_Traits,_Ax>::_Alloc &)' : cannot convert parameter 1 from 'const char *' to 'const std::basic_string<_Elem,_Traits,_Ax>::_Alloc &' with [ _Elem=wchar_t, _Traits=std::char_traits, _Ax=std::allocator ] and [ _Elem=wchar_t, _Traits=std::char_traits, _Ax=std::allocator ] Reason: cannot convert from 'const char *' to 'const std::basic_string<_Elem,_Traits,_Ax>::_Alloc' with [ _Elem=wchar_t, _Traits=std::char_traits, _Ax=std::allocator ] No constructor could take the source type, or constructor overload resolution was ambiguous g:\Program Files\boost\boost_1_38\boost\exception\get_error_info.hpp(30) : error C2440: 'initializing' : cannot convert from 'std::allocator<_Ty>::value_type *' to 'const char *' with [ _Ty=wchar_t ] Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast g:\Program Files\boost\boost_1_38\boost\exception\get_error_info.hpp(30) : error C2439: 'boost::exception_detail::strwrap::ptr' : member could not be initialized g:\Program Files\boost\boost_1_38\boost\exception\get_error_info.hpp(24) : see declaration of 'boost::exception_detail::strwrap::ptr' g:\Program Files\boost\boost_1_38\boost\exception\diagnostic_information.hpp(60) : error C2664: 'std::basic_string<_Elem,_Traits,_Ax>::basic_string(const std::basic_string<_Elem,_Traits,_Ax>::_Myt &)' : cannot convert parameter 1 from 'std::basic_ostringstream<_Elem,_Traits,_Alloc>::_Mystr' to 'const std::basic_string<_Elem,_Traits,_Ax>::_Myt &' with [ _Elem=wchar_t, _Traits=std::char_traits, _Ax=std::allocator ] and [ _Elem=char, _Traits=std::char_traits<char>, _Alloc=std::allocator<char> ] and [ _Elem=wchar_t, _Traits=std::char_traits, _Ax=std::allocator ] Reason: cannot convert from 'std::basic_ostringstream<_Elem,_Traits,_Alloc>::_Mystr' to 'const std::basic_string<_Elem,_Traits,_Ax>::_Myt' with [ _Elem=char, _Traits=std::char_traits<char>, _Alloc=std::allocator<char> ] and [ _Elem=wchar_t, _Traits=std::char_traits, _Ax=std::allocator ] No constructor could take the source type, or constructor overload resolution was ambiguous