How to declare dl exports within dll cp?

Well i'm a newb when it comes to dll's it seem that you can either use a def file or declare the exports within the dll header file. Well this is just a starter dll.

My def file has to contain this info,

Code:

LIBRARY "project1.dll"
EXPORTS 
xorString

So how do i decalre this in the cpp instead Somewhere within this statement?

Code:

#ifndef _DLL_H_
#define _DLL_H_

#if BUILDING_DLL
# define DLLIMPORT __declspec (dllexport)
#else /* Not BUILDING_DLL */
# define DLLIMPORT __declspec (dllimport)
#endif /* Not BUILDING_DLL *

You can add the declspec to the function prototype. You probably also wish to use extern "C" to avoid C++ name mangling and __stdcall to allow Visual Basic to call your DLL.

So:

Code:

int xorString(char * szIn);

becomes

Code:

extern "C" DLLIMPORT int __stdcall xorString(char * szIn);

You may wish to combine this into a macro:

Code:

#define DLLFUNCTION(retType) extern "C" DLLIMPORT retType __stdcall

which you can use:

Code:

DLLFUNCTION(int) xorString(char * szIn);

Make sure BUILDING_DLL is defined when you compile your DLL.

I've just been readin up on calling conventions, it says you can either use,

extern "C" __declspec(dllexport) void(etc) or,

extern "C" int __stdcall , well in my dll i have tried,

extern "C" __declspec(dllexport)

void __stdcall funcmy(){

and this works . Why is that ?

Why not? I don't know any reason that you can not combine __declspec(dllexport) with __stdcall. The first signifies that the function should be exported from the DLL while the latter tells the compiler to use the __stdcall calling convention.