How to export overloads of a function in a C++ dll??

Question

I am looking for a way to export from my C++ dll a function with two overloads.

This is my overloads on the .h file:

static __declspec(dllexport) int __stdcall TotalCost(char* a, double* b);
static __declspec(dllexport) int __stdcall TotalCost(char* a, double* b, double c);

my questions are:

• is it possible to export overloads of a function??
• how I can set in the file .def the EXPORT ??

Thanks in advance Fabio

Answer 1

Yes, you can export overloads.

The classic way is to add the following macro definition to your library headers:

#ifdef MYLIB_EXPORTS
  #define MYLIB_API __declspec(dllexport)
#else
  #define MYLIB_API __declspec(dllimport)
  #pragma comment(lib,"MYLIB.lib")
#endif
//...

Use the above macro in your interface files:

MYLIB_API int ComputeTotal(...
class MYLIB_API C_MyClass...

You will have to define MYLIB_EXPORTS in your DLL project settings (C++/Preprocessor Definitions).