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To: Danny Smith <danny_r_smith_2001 AT yahoo DOT co DOT nz>
Cc: cygwin AT cygwin DOT com
Subject: Re: Can open() from console app, not from dll
From: Massimiliano Mirra <mmirra AT libero DOT it>
Date: Wed, 02 Apr 2003 01:55:16 +0200
In-Reply-To: <20030401233049.66728.qmail@web21408.mail.yahoo.com> (Danny
 Smith's message of "Wed, 2 Apr 2003 09:30:49 +1000 (EST)")
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Danny Smith <danny_r_smith_2001 AT yahoo DOT co DOT nz> writes:

>> I am able to open a file and write into it from a console application,
>> but the same fails when done from within a function that is stored in
>> a DLL and called from a Visual Basic application.
>
> VB expects stdcall convention.
> Try adding WINAPI to OpenSomething

Hmmm.  If I understand correctly, and it's to be written ``int WINAPI
OpenSomething'', it seems that it becomes unable to even call the
function:

``Can't find DLL entry point OpenSomething in foo.dll''

Maybe I should have made it clearer that simply calling DLL functions
is working; it's when they contain an open() that they just crash.

> You will also need to either  munge your declaration in VB to match the
> exported name

The name in foo.c is OpenSomething, the name in foo.def if
OpenSomething, the name in the VB source is OpenSomething.  Is this
what you mean?

(Sorry if that's a dumb question.  I'm totally oblivious of the VB
side here, luckily it's not me working on that.)

Thank you!

Massimiliano


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