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Article View: comp.os.ms-windows.programmer.misc
Article #1798

Problems calling a DLL function from a VB app. PLEASE HELP!

#1798
From: tvp
Date: Tue, 15 Dec 1992 13:58
28 lines
1801 bytes
Okay, I posted a few days ago about not wanting the screen to blank
for the few seconds it took me Shell() out to DOS to run an .exe
utility (written in C) that I was calling from inside my VB app.

I rewrote the inside of my C source to compile it into a .dll file.
Then I followed the instructions in the VB manuals to declare and call
the function inside the DLL that was replacing the standalone C app I
used to use under DOS. But when I hit F5 to test the VB app, and get
to the part where I push the command button that will cause the DLL
function to be called, it fails and tells me:

          "Function or sub undefined"

It also highlights the line where the function is called in the
source.  This is pretty maddening because the function IS defined
right there in the Declarations section of the form. And it's defined
correctly as far as I can tell too, it's of the proper type, with no
mispellings in the Function name or the Lib path. Does anyone know
what's up and how I can fix it? I'M STUCK!

Thanks in advance to anyone who can help me.

------------------------------------------------------------------------
Tad Perry      Internet:    tvp@gibdo.engr.washington.edu
               CompuServe:  70402,3020
               NIFTY-Serve: GBG01266
------------------------------------------------------------------------
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Message-ID: <1992Dec15.135809.5339@u.washington.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!news.u.washington.edu!gibdo!tvp

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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!news.u.washington.edu!gibdo!tvp
From: tvp@gibdo.engr.washington.edu
Newsgroups: comp.os.ms-windows.programmer.misc
Subject: Problems calling a DLL function from a VB app. PLEASE HELP!
Message-ID: <1992Dec15.135809.5339@u.washington.edu>
Date: 15 Dec 92 13:58:09 GMT
Article-I.D.: u.1992Dec15.135809.5339
Sender: news@u.washington.edu (USENET News System)
Organization: clearer than blir
Lines: 28