calling a function in DLL file ???

[Jacky1]

I did make my dll file out off those two files

dll.h

#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 */

DLLIMPORT void welcome();

class DLLIMPORT DllClass
{
  public:
    DllClass();
    virtual ~DllClass(void);

  private:

};


#endif /* _DLL_H_ */

and dllmain.cpp

/* Replace "dll.h" with the name of your header */
#include "dll.h"
#include <windows.h>
#include<iostream>
using namespace std;
DllClass::DllClass()
{

}


DllClass::~DllClass ()
{

}

DLLIMPORT void welcome()
{
  cout << " Welcome home " << endl;
}

BOOL APIENTRY DllMain (HINSTANCE hInst     /* Library instance handle. */ ,
                       DWORD reason        /* Reason this function is being called. */ ,
                       LPVOID reserved     /* Not used. */ )
{
    switch (reason)
    {
      case DLL_PROCESS_ATTACH:
        break;

      case DLL_PROCESS_DETACH:
        break;

      case DLL_THREAD_ATTACH:
        break;

      case DLL_THREAD_DETACH:
        break;
    }

    /* Returns TRUE on success, FALSE on failure */
    return TRUE;
}

now I want to call welcome() function in this DLL from my test_main.cpp

main.cpp

#include <cstdlib>
#include <iostream>
#include<project3.dll> // <<---------- the dll file include 
 
using namespace std;

int main(int argc, char *argv[])
{
    welcome();           // <<------ this function in the DLL
    system("PAUSE");
    return EXIT_SUCCESS;
}

but I got those errors

3 \including dll\main.cpp project3.dll: No such file or directory. 
9 \including dll\main.cpp `welcome' undeclared (first use this function)

I have project.dll in the directory

And when I made the dll file I didn't have anyfile *.lib

I only have a file libProject3.def I tried to include it but it won't work either

any advice please ?

Thanks

[dougy83]

include the dll.h header, and not the project3.dll file.

Make an import library - the .lib file, should be an option in your compiler/linker

link the .lib file into your project. The program will know how to access the .dll file from the details stored in the .lib file.

[Jacky1]

include the dll.h header, and not the project3.dll file.

Make an import library - the .lib file, should be an option in your compiler/linker

link the .lib file into your project. The program will know how to access the .dll file from the details stored in the .lib file.

Thanks man I found out that the lib file was with extinction .a and I just linked in the project options as you said

Thanks again