Hi all...I know there are a lot of similar threads but I haven't understood this yet...

This is the code in dllmain.cpp

code:

---

#include "stdafx.h"
extern "C"__declspec(dllexport) int somma(int a, int b);
BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}

int somma(int a, int b){

    return a + b;

}

---

code:

---

function OnEvent_Initialize(MessengerStart)
{
var s=0;

s= Interop.Call(MsgPlus.ScriptFilesPath + "\\dll.dll", "somma", "2","3");
MsgPlus.DisplayToast("sss", s);
Interop.FreeDll(MsgPlus.ScriptFilesPath + "\\dll.dll");
}

---

code:

---

extern "C" __declspec(dllexport) int __stdcall somma(int a, int b) {
    return a + b;
}

---

Thank u

But now t says that it fails the collocation of the function "somma"...O.o


edit: mmm..it seems to not find the somma function....the name is correct..so why?


SOLVED

With the help of http://www.dependencywalker.com/ I've found the real name of funvtion that was _somma@8

If you remove the __declspec(dllexport) then use a .def file, the name will remain in a readable format.

how can I create a .def?

...

Project -> Add New -> .def

Right. For VC6, you just create a new text file and save it as <projectname>.def

The contents of the file can look something like this:

code:

---

LIBRARY "My Library"
EXPORTS
    ; Explicit Exports go here
    MyFunction

---

ok thanks a lot ; )