Deleting intermediate files and output files for project 'dblink - Win32 Release'. --------------------Configuration: dblink - Win32 Release-------------------- Compiling... dblink.cpp Linking... Creating library Release/dblink.lib and object Release/dblink.exp dblink.obj : error LNK2001: unresolved external symbol "public: class OParameter __thiscall OParameterCollection::Add(char const *,char const *,int,int)" (?Add@OParameterCollection@@QAE?AVOParameter@@PBD0HH@Z) dblink.obj : error LNK2001: unresolved external symbol "public: __thiscall ODynaset::ODynaset(class ODatabase const &,char const *,long)" (??0ODynaset@@QAE@ABVODatabase@@PBDJ@Z) Release/dblink.dll : fatal error LNK1120: 2 unresolved externals Error executing link.exe. dblink.dll - 3 error(s), 0 warning(s)In the past I have found that C++ is very finicky when it comes to compiling things and projects are very hard to get working with just the c++ files.