Calling DLLs from non-DLLs
It is possible to call a DLL from a COBOL program that
is compiled with the NODLL option, but there are
restrictions.
About this task
You can use the following methods to ensure that the DLL linkage is followed:
- Put the COBOL DLL programs that
you want to call from the COBOL
non-DLL programs in the program object that
contains the main program. Use static calls from the COBOL non-DLL
programs to call the COBOL DLL programs.
The COBOL DLL programs in the program object that contains the main program can call COBOL DLL programs in other DLLs.
- Put
the COBOL DLL programs in DLLs and call them from COBOL non-DLL
programs with
CALLfunction-pointer, where function-pointer is set to a function descriptor of the target program. You can obtain the address of the function descriptor for the program in the DLL by calling a C routine that usesdllloadanddllqueryfn.
Example: calling DLLs from non-DLLs