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Using a C-language API DLL

Posted on 1997-10-08
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203 Views
Last Modified: 2006-11-17
Environment: Windows 95 and MS VC++ 1.52
I am trying to make a call to a function in a DLL (16-bit) and I keep getting the following Prog Error:
" Your program is making an invalid dynamic link call to a .DLL file"
I do have the .lib in the import libraries of the Linker Options, in the imports section of my .def file, and in the Directories Libraries path.

Following is my program:

#define ELOG_MODULENAME   "TEST"
#include <stdio.h>      /* needed for ELOGPUB.h */
#include <stdlib.h>
#include <string.h>
#include <rctpub.h>
#include <memory.h>
#include <malloc.h>
#include <windows.h>
#include <profpub.h>
#include <gtipub.h>
#include <actmpub.h>
#include <rctmsg.h>
#include <elogpub.h>
#include <rctxpub.h>
#include <fetixpub.h>  

int main ( int argc, char * argv[] )
{
   long lCoreSession   = 0;
   long lCoreConectRec = 0;  
   int  iRV            = 0;

   printf("Hello1\n");  
   
  /* RctXInitializeCORESession is the function that I have been trying to call, which is in a third-party DLL*/
   iRV = RctXInitializeCORESession( &lCoreSession,
                                    &lCoreConectRec,
                                    "RCTX_A",
                                    "FREDUSER",
                                    "" );  
   printf("Hello2\n");                                    
}

I would really appreciate any help in this matter. Thanks a million!!!
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Question by:achimala
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4 Comments
 
LVL 2

Expert Comment

by:Srw
ID: 1255664
Do you get the error when you call RctX...(), or when you run the program?

Are you sure that the actual DLL being loaded is the 16-bit version?
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Author Comment

by:achimala
ID: 1255665
I am getting the error, when I run the .exe (which means, the .exe is being created with no errors!!!). And I am sure the DLL being loaded is a 16-bit version. Some of my friends suggested that I check whether the DLLs have been registered or not. I did run the regedit and searched for them, but couldn't find them there. Is this a problem?  
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LVL 7

Accepted Solution

by:
faster earned 70 total points
ID: 1255666
Your exe is windows console problem, but I remember that in VC 1.52, it does not support this yet. (probably there is noo 16 bit console program).  So your program is actually a DOS program and therefore can not use dll.

Try to create a normal windows program (which use WinMain instead of main()), and see whether it is successful.
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LVL 7

Expert Comment

by:faster
ID: 1255667
By "windows console problem", I actually mean "windows console program".
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