🚀 go-pugleaf

In article <1992Dec15.135809.5339@u.washington.edu> tvp@gibdo.engr.washington.edu writes:
>
>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.

  There are 2 possibilities that I can think of:
	1. you forgot to 'export' the function
	2. you compiled in C++ mode without the "extern C" declaration
	   and C++ mangled the function name
  Both of these concepts should be well documented in your C++ docs.
-- 
John A. Grant						jagrant@emr1.emr.ca
Airborne Geophysics
Geological Survey of Canada, Ottawa