Hello, I'm trying to create a MVS C++ 6.0 project to be able to query my postgresql database. I build all needed libraries (libpq.dll,libpqdll.lib,libpq.lib). All are in release mode. I can't succeed linking my project. I always get link errors (see below). Does anyone as any example of such project, or any information about this errors ? Thank you for your help. Armelle nafxcw.lib(afxmem.obj) : error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in LIBCMT.lib(new.obj) nafxcw.lib(afxmem.obj) : error LNK2005: "void __cdecl operator delete(void *)" (??3@YAXPAX@Z) already defined in LIBCMT.lib(delete.obj) ApiSQL.obj : error LNK2001: unresolved external symbol "void __cdecl std::_Xlen(void)" (?_Xlen@std@@YAXXZ) Release/testAPISql.exe : fatal error LNK1120: 1 unresolved externals Error executing link.exe. ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster