🚀 go-pugleaf

In article <1992Dec15.135809.5339@u.washington.edu> tvp@gibdo.engr.washington.edu writes:
>From: tvp@gibdo.engr.washington.edu
>Subject: Problems calling a DLL function from a VB app. PLEASE HELP!
>Date: 15 Dec 92 13:58:09 GMT
>
>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
>------------------------------------------------------------------------
Are you using Borland C?  If so, I may have the answer.  It may even apply 
to Microsoft C; I don't know.  Is your DLL function declared as an export in 
your DEF file?  Like this:

LIBRARY        DLLEX
DESCRIPTION    'Borland C DLL example'
EXETYPE        WINDOWS
CODE           PRELOAD MOVEABLE DISCARDABLE
DATA           PRELOAD MOVEABLE SINGLE
HEAPSIZE       20480
EXPORTS        MyOwnFunctionName     <------- (right here)
               OtherFunctionName
               EtCetera

I was able to duplicate your error message "sub or function not defined" 
simply by deleting the name of one of my functions from the 
EXPORTS list.  Hope this helps.                
---------------------------------------
Any opinions expressed here are mine alone,
and are not those of my employer or anyone else.

Brian McCarthy
United Technologies Research Center
East Hartford, Connecticut
(203)727-7638
bsm@utrc.utc.com
---------------------------------------