LNK2001: undefined reference to all the export functions from .def

Question

hi
i am getting link error(s) when i call function(s) from dll, and wondering the cause.
i use the std calling convention and the function(s) from my
dll.h is/are coded as:
#define DLLROUTINE  void __stdcall 
typedef int MVSDD;
DLLROUTINE mvstestmsdn_DLL(const double gamma, const double omega,...);
In dll.def, i define:
EXPORTS
mvstestmsdn_DLL @12
Eventually from my dll.c, when i call
mvstestmsdn_DLL();
i got error LNK2001:unresolved external symbol mvstestmsdn_DLL
Thanks in advance for any help on this.

Answer 1

I have added as suggested from dll.h
#define DllExport _declspec(dllexport)
typedef int MVSDD;
extern _declspec(dllexport) mvstestmsdn_DLL(const double gamma, const double omega,...);
As a result:
on a positive side i've now got only 10 LNK2019 errors such as 
error LNK2019: unresolved external symbol _mvstestmsdn_DLL referenced in function _main
compared to 93 errors LNK2001 from my previous post
Over roughly hundreds of functions, it's a nice improvement.
Running dumpbin/export from cd project directory using the command line outputs:
Microsoft
 <R> COFF/PE Dumper Version 12.00.31101.0
Copyright
microsoft Incorporation
Summary
in a nutshell , nothing interesting with dumpbin unless i ve done something wrong
Cheers