Function Calling From A DLL In a DLL

Hmm, this may sound confusing lol. I am making a dll that needs to call functions from another dll.

My program will have to dlls, fen.dll & dat.dll. Basically what im having problems doing is calling a putting a function from dat.dll inside fen.dll and then calling it.

I think this is possible to do isnt it?

Anyway i can put can get fen.dll to compile fine, and i can call my own functions just written in that dll from my program fine, but when i try to call a function from fen.dll thats in dat.dll :confused: it just dosnt work, has no effect in the program.

Can someone show me how i should define functions inside fen.dll so i can use them. I am linking the dat.lib file as well.

So i just need to know how to define functions in fen.dll so i can just call them in fen.dll from dat.dll.

Thanks,
TNT

Not too difficult! With the first dll, use LoadLibrary() to load the second dll.....then use GetProcAddress() to give you the function in the second dll....ala

Code:

---

//MyMain exe
#include <windows.h>

#define DllImport extern "C" __declspec (dllimport)

DllImport int LoadAndRun(void);

int WINAPI WinMain(HINSTANCE hThisInstance,
                                  HINSTANCE hPrevInstance,
                                  LPSTR lpszArgument,
                                  int nFunsterStil){

        LoadAndRun();
       
        return 0;
}

---

Code:

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//MyFirstDll.dll
//- use the library from this created to build the exe above
#include <windows.h>

#define DllExport extern "C" __declspec (dllexport)

typedef void (*MYDLLFUNC)(void);

DllExport int LoadAndRun(void){

        HMODULE hMod;
        MYDLLFUNC MyDllFunc = NULL;

        hMod = LoadLibrary("MySecondDll.dll");
        if(!hMod){
                MessageBox(HWND_DESKTOP,"Error",NULL,MB_OK);
                return 1;
        }

        MyDllFunc = (MYDLLFUNC)GetProcAddress(hMod,"FunctionInSecondDll");
        if(!MyDllFunc){
                MessageBox(HWND_DESKTOP,"Error",NULL,MB_OK);
                return 1;
        }

        MyDllFunc();

        FreeLibrary(hMod);
        MyDllFunc = NULL;


        return 0;
}

---

Code:

---

//MySecondDll.dll
// - Dont need the librarythat the compiler produces for this dll
#include <windows.h>

#define DllExport extern "C" __declspec (dllexport)

DllExport FunctionInSecondDll(void){

        MessageBox(HWND_DESKTOP,"Got there in the end!!",NULL,MB_OK);

}

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