Net Express 3.1 Calling DLL's

[webrabbit]

What environment variables, etc. do I have to set to access DLL's for my subprograms with standard CALL "SUBPROG" USING? They are in the same subdirectory as the EXE's. The only way I have been able to call the subprograms is to LINK the OBJ's.

 

[MKuiper]

Hi webrabbit,

Suppose you have a dll called "mydll.dll", exporting "myfunction":

In the WORKING-STORAGE SECTION:

01  MYDLL.
    03  P-MYDLL-NUM PIC 9(09) COMP-5.
    03  P-MYDLL     REDEFINES P-MYDLL-NUM
                    USAGE PROCEDURE-POINTER.

In the PROCEDURE DIVISION.

 PROCEDURE DIVISION.
 MAIN SECTION.
 MAIN000.
*    Loading the dll
     SET P-MYDLL TO ENTRY "mydll.dll".
*    Check if loading was successfull
     IF  P-MYDLL-NUM = 0
         DISPLAY "Failure loading mydll.dll"
         STOP RUN.
*    Now you can use all exported functions of mydll.dll
     CALL "myfunction" USING ... RETURNING ...

Depending on the exports of the dll, you might use a different call convention. You can find about this in the Net Express help.
Marcel

 

[webrabbit]

I know the COBOL format. When I compile the sub-program as an OBJ and link it with the main program, it works just fine. But when I compile the sub-program as a DLL, compile the main program to do dynamic calls, I get the message LOAD FAILURE ON MY-DLL.DLL.

 

[3gm]

Any chance MY-DLL.DLL is not in your execution path? Or are there any dependent dlls that are not in the execution path?

Regards.

Glenn

 

[webrabbit]

MY-DLL is in the same subdirectory as the main program. There are no other DLLs being called before or in MY-DLL.