Subj : How to compile cpp using a dll
To   : borland.public.cpp.borlandcpp
From : ssk
Date : Tue Aug 24 2004 05:42 pm

Hello!

I am trying to create a dll and to use it.
I copied sources(console program) and can't compile them.
I'm using BCC32.exe 5.3 on XP Professional.

I copied the sources and saved them in a same directory like:

dlltest.cpp
dlltest.h
dllrun.cpp

I compiled like:

bcc32 -tWD dlltest.cpp -> OK! Created dlltest.obj, dlltest.dll, dlltest.tds
bcc32 -tWC dllrun.cpp -> Error!

Here's the error message:

Borland C++ 5.3 for Win32 Copyright (c) 1993, 1998 Borland International
dllrun.cpp:
Turbo Incremental Link 3.0 Copyright (c) 1997, 1998 Borland International
Error: Unresolved external '_NumberList' referenced from C:\DOCUMENTS AND SETTIN
GS\SSK\MY DOCUMENTS\MY CODES\C++\TEST\DLL\DLLRUN.OBJ
Error: Unresolved external '_LetterList' referenced from C:\DOCUMENTS AND SETTIN
GS\SSK\MY DOCUMENTS\MY CODES\C++\TEST\DLL\DLLRUN.OBJ

I tried to copy dlltest.dll to C:\Windows\System32 but it didn't work.

How can I solve this problem?

<source>

----------dlltest.h--------
#ifndef _DLLTEST_H_
#define _DLLTEST_H_

#include <iostream.h>
#include <stdio.h>
#include <windows.h>

extern "C" __declspec(dllexport) void NumberList();
extern "C" __declspec(dllexport) void LetterList();


#endif
------------------------------

---------dlltest.cpp-----------
#include "dlltest.h"

#define MAXMODULE 50

char module[MAXMODULE];


extern "C" __declspec(dllexport)

void NumberList() {

   GetModuleFileName(NULL, (LPTSTR)module, MAXMODULE);

   cout << "\n\nThis function was called from "
        << module 
        << endl << endl;

   cout << "NumberList(): ";


   for(int i=0;  i<10; i++) {

        cout << i << " ";
   }

   cout << endl << endl;
}



extern "C" __declspec(dllexport)

void LetterList() {

   GetModuleFileName(NULL, (LPTSTR)module, MAXMODULE);

   cout << "\n\nThis function was called from "
        << module 
        << endl << endl;

   cout << "LetterList(): ";


   for(int i=0;  i<26; i++) {

        cout << char(97 + i) << " ";
   }

   cout << endl << endl;
}
------------------------------

-------------dllrun.cpp----------------

#include <conio.h>
#include <dlltest.h>

void main() {

   NumberList();
   LetterList();

   getch();
}
--------------------------------------

Thanks in advance.

Sam

.