Thread: How to declare dl exports within dll cp?

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.