Re: DLL, VB and Borland C/C++

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#175

From: Nick Primavesi
Date: Mon, 25 Mar 1996 09:52

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tlgnsmd@mail.interpac.be (Michel Lombart) wrote:

>Sylvain Souche <souche@supaero.fr> wrote

>>Hi,

>>I am trying desperatly to call a DLL created with Borland C/C++ 4.5 in a 
>>VB 3.0 application, but VB always complains about a so called "Bad 
>>Calling Convention Error". This Error message is not very documented, 
>>and Borland Help files are worth nothing, so...

> Hi Sylvain.

>Did you use, if necessary,  the "byval" option in your declaration
>code?

>Michel

I have the same problem with VB4.0 and Visual C++ DLLs

The ByVal option is required but this does not always cure the
problem.

VB uses the PASCAL calling convention so the DLL should be compiled
using FAR PASCAL for 16 bit or __stdcall. This still did not cure my
problem but it got me closer.

I have just been infomed that my problem is due to the omission of the
.DEF file by the VC++ compiler now so check that you also have the
DEF file with the .DLL.

Let me know if this helps and if you discover anything that may help
me.

Cheers,

Jolyon.

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Path: arc1-ca.pugleaf.net!news.sinet.slb.com!usenet
From: primaves@manchester.gm.slb.com (Nick Primavesi)
Newsgroups: comp.lang.basic.visual.misc,comp.lang.c,comp.lang.c++
Subject: Re: DLL, VB and Borland C/C++
Date: Mon, 25 Mar 1996 09:52:01 GMT
Organization: Schlumberger
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