Solved

make DLL

Posted on 1997-09-17
9
433 Views
Last Modified: 2011-10-03
Little help needed.
Using  C++ 40  Win NT
Failure to build DLL file
----
#include <windows.h>
#include <ole2.h>
#include <sql.h>
#include <sqlext.h>

#ifdef _WIN32
  #define CCONV _stdcall
  #define NOMANGLE
#else
  #define CCONV FAR PASCAL _export
  #define NOMANGLE EXTERN_C
  #include <stdlib.h>
  #include <compobj.h>    
  #include <dispatch.h>
  #include <variant.h>
  #include <olenls.h>  
#endif

NOMANGLE LONG CCONV PassByte ()
{
RETCODE rs;
HENV henv;
rs=SQLAllocEnv(&henv);
rs=SQLFreeEnv(henv);
return      rs;
}
-----------------------------def, file
LIBRARY vb4dll

CODE      PRELOAD MOVEABLE DISCARDABLE
DATA      PRELOAD MOVEABLE

EXPORTS
      PassByte      @1
-----------
Error message LNK1141
Failure durning bulild of export file

Please give a clue.

mativare@i-2000.com
Please make corrections to code and post , then every
beginner(like me) can see it on a net.
Matt
0
Comment
Question by:mativare
  • 3
  • 2
  • 2
  • +1
9 Comments
 
LVL 3

Expert Comment

by:msmits
ID: 1254830
Is the file a .c file or a .cpp. When .cpp you must use:

extern "C" {
...
}

or just use a .c file.
This will disable the name mangling so the linker can find the right function.

0
 
LVL 1

Author Comment

by:mativare
ID: 1254831
filenames were  vb4dll.c
and vb4dll.def
Unfortunately question remains unanswered.
Thanks  for a attempt.
Matthew
0
 
LVL 3

Expert Comment

by:msmits
ID: 1254832
except for the SQL stuff I could generate your DLL fine. I use Borland C++ 5.02 on win95 at the moment.

0
 
LVL 1

Expert Comment

by:navigator010897
ID: 1254833
Um,
you have a real strange problem.

I just compiled your dll, the .cpp and the .def file on MSVC++ 4.0 Standard on Win95 and if compiled flawlessly.  

Perhaps you set up the project wrong, and instead of just a pure dll you set up an app wizard mfc dll?  Or maybe perhaps you didn't do a full install with msvc and are missing some of the header files needed for the ole/sql?
0
Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

 
LVL 1

Author Comment

by:mativare
ID: 1254834
I used "pure dll Option". It compiled too, but building(linking) went wrong
Messages LNK 4044, LNK1181,  LNK1141
Still hoping
Matthew
0
 
LVL 1

Expert Comment

by:navigator010897
ID: 1254835
Are you sure you included all of the database support options when you installed MSVC 4.0?  It seems very odd that you are having this trouble, as I said, I just cut and pasted your code, and it worked flawlessly...
0
 
LVL 1

Expert Comment

by:Seeker092397
ID: 1254836
Along with LNK1181 error must come a name of a file linker could not find. What is it?
0
 
LVL 1

Author Comment

by:mativare
ID: 1254837
fatal error LNK1181: cannot open input file "Files\DevStudio\BIN\link.exe"
Good man you solved it, because my Dev Studio is located in
"Program Files."
Seems I need to do reinstallment of VC++, if you have any other hints
how to "tell" compiler where are files, let me know.
 I know there are files  like
setup .ini and...
Thanks a lot.
Matt
Matthew


0
 
LVL 1

Accepted Solution

by:
Seeker092397 earned 100 total points
ID: 1254838
I am glad I helped You. If You'd be so kind, please transfer me the value of the answer. Thanx.
0

Featured Post

Too many email signature changes to deal with?

Are you constantly being asked to update your organization's email signatures? Do they take up too much of your time? Wouldn't you love to be able to manage all signatures from one central location, easily design them and deploy them quickly to users. Well, you can!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Preface I don't like visual development tools that are supposed to write a program for me. Even if it is Xcode and I can use Interface Builder. Yes, it is a perfect tool and has helped me a lot, mainly, in the beginning, when my programs were small…
Summary: This tutorial covers some basics of pointer, pointer arithmetic and function pointer. What is a pointer: A pointer is a variable which holds an address. This address might be address of another variable/address of devices/address of fu…
The goal of this video is to provide viewers with basic examples to understand how to use strings and some functions related to them in the C programming language.
The goal of this video is to provide viewers with basic examples to understand and use switch statements in the C programming language.

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now