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Calling a C++ Builder DLL from VC++

 
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Harish
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PostPosted: Wed Jun 28, 2006 4:35 pm    Post subject: Calling a C++ Builder DLL from VC++ Reply with quote


I have a DLL written in BC++ 6.0. All the exported functions from the DLL are extern "C". I need to call it from VC++ 6.0. How can I generate the import library to the DLL?
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Ed Mulroy
Guest
PostPosted: Wed Jun 28, 2006 9:06 pm    Post subject: Re: Calling a C++ Builder DLL from VC++ Reply with quote


You can use Microsoft tools to create a Microsoft format import library.

As an alternative you can use implib.exe to create a module definition file
and use that with BC++.

This is not an exotic solution. Import libraries are merely a library
format way to bundle up part of what has been historically done with module
definition files.

.. Ed

Quote:
Harish wrote in message
news:44a2696b$1 (AT) newsgroups (DOT) borland.com...

I have a DLL written in BC++ 6.0. All the exported functions
from the DLL are extern "C". I need to call it from VC++ 6.0.
How can I generate the import library to the DLL?
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Harish
Guest
PostPosted: Fri Jun 30, 2006 8:10 am    Post subject: Re: Calling a C++ Builder DLL from VC++ Reply with quote


Thanks, Ed Mulroy, but I'm afraid I cannot do it.
First, which MS tools should I use?
Second, I can call a VC++ created DLL from BC++ (using the BC++ provided fantastic implib tool). But I want to call a BC++ created DLL from VC++. Could you plz give a more specific solution?
-Harish

"Ed Mulroy" <dont_email_me (AT) bitbuc (DOT) ket> wrote:
Quote:
You can use Microsoft tools to create a Microsoft format import library.

As an alternative you can use implib.exe to create a module definition file
and use that with BC++.

This is not an exotic solution. Import libraries are merely a library
format way to bundle up part of what has been historically done with module
definition files.

. Ed

Harish wrote in message
news:44a2696b$1 (AT) newsgroups (DOT) borland.com...

I have a DLL written in BC++ 6.0. All the exported functions
from the DLL are extern "C". I need to call it from VC++ 6.0.
How can I generate the import library to the DLL?

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Ed Mulroy
Guest
PostPosted: Mon Jul 03, 2006 10:49 pm    Post subject: Re: Calling a C++ Builder DLL from VC++ Reply with quote
It has been so long since I did this with a Microsoft tool that I had to ask
about it. Remy Lebeau suggested this link and it seems to answer your
question.

http://tinyurl.com/llgon
or, in its long form
http://web.archive.org/web/20031207213941/http://bcbdev.com/articles/bcbdll.htm#example1

.. Ed

Quote:
Harish wrote in message
news:44a4a98a$1 (AT) newsgroups (DOT) borland.com...

Thanks, Ed Mulroy, but I'm afraid I cannot do it.
First, which MS tools should I use?
Second, I can call a VC++ created DLL from BC++ (using the
BC++ provided fantastic implib tool). But I want to call a BC++
created DLL from VC++. Could you plz give a more specific
solution?
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Ron Sawyer
Guest
PostPosted: Sun Jul 16, 2006 3:19 am    Post subject: Re: Calling a C++ Builder DLL from VC++ Reply with quote
I have never found a tool to allow me to do this. I end up making a dummy
dll in Visual C++ with stubs for functions and compile it to create the
import lib.

"Harish" <cshavadhani (AT) yahoo (DOT) com> wrote in message
news:44a2696b$1 (AT) newsgroups (DOT) borland.com...
Quote:

I have a DLL written in BC++ 6.0. All the exported functions from the DLL
are extern "C". I need to call it from VC++ 6.0. How can I generate the

import library to the DLL?
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Olivier Bertini
Guest
PostPosted: Sun Jul 16, 2006 5:26 am    Post subject: Re: Calling a C++ Builder DLL from VC++ Reply with quote
Harish a écrit :
Quote:
I have a DLL written in BC++ 6.0. All the exported functions from the DLL are extern "C". I need to call it from VC++ 6.0. How can I generate the import library to the DLL?

Can't you use a def file? def files are created with impdef.exe from
Borland.

eg: impdef -a deffile.def dllname.dll

(I am not sure about the -a parameter)

The accepted format from MS is something like that:

LIBRARY <Name to use inside DLL>
DESCRIPTION "<Description>"
EXPORTS
<First export> @1
<Second export> @2
<Third export> @3
...

For an example, .def file will look like this:

LIBRARY EasyDLL
DESCRIPTION "Does some sphere stuff."
EXPORTS
GetSphereSAandVol @1


The MS LINK option is /def:".\deffile.def"


alternatively you can try to generate a .lib import library once you
have the .def file:

LINK /LIB /MACHINE:x86 /def:defflie.def /out:dllname.lib /name:dllname.dll


I suggest you have a look at these both links:

http://groups.google.ch/group/borland.public.cpp.ide/browse_thread/thread/9f5dc890ee4691e5/246263cf9bbd13ef?lnk=st&q=using+def+files+with+visual+c&rnum=17&hl=fr#246263cf9bbd13ef

http://groups.google.ch/group/borland.public.cppbuilder.non-technical/browse_thread/thread/73fe0ea26f2dfcbf/682d7471a8f63e74?lnk=st&q=using+def+files+with+visual+c&rnum=25&hl=fr#682d7471a8f63e74



I know this isn't a clear answer but I am sure you can start from here.

Olivier
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