[GnuCOBOL 2.0] Beginning COM

In my ample (NOT!) spare time, I'm exploring making COM available to the Windows implementation of GnuCOBOL. You can do GnuCOBOL on Linux and Mac as well.

Many thanks to Brian Tiffin over on GnuCOBOL's Sourceforge Forum for cheering me on.

       IDENTIFICATION DIVISION.
       PROGRAM-ID. OLE.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  HRESULT     USAGE BINARY-LONG.
           88 S_OK     VALUE 0.
           88 S_FALSE  VALUE 1.
       01  NUL         USAGE BINARY-LONG VALUE 0.
       
       PROCEDURE DIVISION.
       MAIN-PROCEDURE.
        CALL STDCALL "OleInitialize"
            USING BY VALUE NUL
            RETURNING HRESULT.
            DISPLAY HRESULT.

        CALL STDCALL "OleUninitialize" USING
            BY REFERENCE OMITTED
            GIVING NULL.

            STOP RUN.
       END PROGRAM OLE.

The are some runtime settings (Windows 10 Home, 64bit) required to get that working, namely

set COB_PRE_LOAD=ole32
set COB_LIBRARY_PATH=C:\windows\syswow64

I should sometime create a Github project for this, in case others want to run with it.

© Copyright Bruce M. Axtens, 2015