From:	gunther DOT ebert AT ixos-leipzig DOT de (Gunther Ebert)
Subject:	Re: DLL's for use with other languages..
12 Jun 1997 14:00:15 -0700 :
Approved:	cygnus DOT gnu-win32 AT cygnus DOT com
Distribution:	cygnus
Message-ID:	<33A017C8.661B.cygnus.gnu-win32@ixos-leipzig.de>
References:	<33A008C1 DOT 4342E063 AT voicenet DOT com>
Mime-Version:	1.0
X-Mailer:	Mozilla 2.01Gold (WinNT; I)
Original-To:	J Russell Smyth <jrussell AT voicenet DOT com>
Original-Cc:	gnu-win32 AT cygnus DOT com
Original-Sender:	owner-gnu-win32 AT cygnus DOT com

Hi,

the problem might be that you haven't declared your dll functions
as _stdcall (using the WINAPI or STDCALL macro).

If the prototypes of your dll functions look like

int foo();

they have to be changed to

int WINAPI foo();

Note that you have to #include <windows.h> to use 
the WINAPI macro.

Hope this helps,
Gunther


J Russell Smyth wrote:
> 
> Hello all..
> 
>   I am new to GNU-WIN32 and to windows C/C++ programming in general,
> though fairly competent C programmer in DOS/UNIX. What I want to know is
> can GNU-WIN32 or cygwin32 create dll's that can be used by Visual Basic?
> I have tried some small dll's and tested with C drivers which works ok,
> but when I try to use with VisBasic I get one of several errors..
> 
>    unable to find function in dll
>    invalid call (help makes ref to pascal calling convention)
> 
> I have tried using cygwin32, mingw32, and also lcc.. all pass the C
> driver test, but all fail the VB test
> 
> any help would be appreciated..
> 
>    Russ Smyth
>    jrussell AT voicenet DOT com
> -
> For help on using this list (especially unsubscribing), send a message to
> "gnu-win32-request AT cygnus DOT com" with one line of text: "help".

-- 

Gunther Ebert
iXOS Anwendungs-Software GmbH
Angerstrasse 40-42
D-04177 Leipzig

Phone : +49 341 48503-0
Fax   : +49 341 48503-99
E-mail: mailto:gunther DOT ebert AT ixos-leipzig DOT de
www   : http://www.ixos-leipzig.de
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For help on using this list (especially unsubscribing), send a message to
"gnu-win32-request AT cygnus DOT com" with one line of text: "help".

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