Correct me if I am wrong, but this error could be fixed by adding .c_str() to the tinyXML call.
./configmanager.h:199: error: no matching function for call to 'TiXmlHandle::FirstChild(wxString&)'
the wxString by ref is not possible, buyt when you add .c_str() it will convert to char *. Visual Studio wrongfully does this for you, a very dangerous assumption.
./tinyxml/tinyxml.h:1460: note: TiXmlHandle TiXmlHandle::FirstChild(const char*) const
- Jorgen