Problem:
Applications will have .EXE programs calling DLLs.
The COBOL progams used to create the >DLLs may have multiple entry points in addition to the main entry point or there might be multiple COBOL programs built into the one .DLL.
Will the LIB file be kept and will LINK resolve calls to these entry points?
Resolution:
Check the related tab for a complete example project.
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M I C R O F O C U S
N E T E X P R E S S
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PROJECT COBOL Entry Points
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DATE CREATED: April, 2006
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BUILD WITH RELEASE: NetExpress 4.0 all06n40.exe
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TABLE OF CONTENTS
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INTRODUCTION
SOURCE FILES
REQUIREMENTS
OPERATION
INTRODUCTION
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This example illustrates how a calling program interfaces with an entry
point in a DLL.
A definite Build protocol must be observed.
Build the DLL file first. Keep the temporary files from the build. The
DLL's import library (*.LIB) is a temporary file. It is created in the
DEBUG folder. In "Project" (menu), "Build Settings..." (button), "Link"
(tab), "Category" (listbox), select "Advanced", check "Keep temporary
Linker files" (checkbox).
Code a "special-names" paragraph in the calling program. Assign the
"static link" (8) call convention a symbolic name (cc8).
special-names.
call-convention 8 is cc8.
Include the "static link" symbolic name in all call statements to DLL
entry points.
call cc8 'ENTRYPT'
When you build the calling program you must specify the import library
file names for the link program. In "Project" (menu), "Build
Settings..." (button), "Link" (tab), "Category" (listbox), select
"Advanced", complete "Link with these LIBS." (textbox), by typing in
your import library folder and file names.
./DEBUG/DLLONE.LIB ./DEBUG/DLLTWO.LIB
"Rebuild All" may not compile your programs successfully. Remember, all
the DLL files must be rebuilt before you can rebuild the EXE program.
SOURCE FILES:
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Program Files
Description
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MAINpgm.cbl This example program calls an entry point "DLLONE1" in
DLL DLLONE and an entry point "DLLTWO1" in DLL DLLTWO.
Call convention 8 and import libraries are used to
resolve the call statements.
DLLONE.cbl This example program has an entry point "DLLONE1" and
when compiled creates an import library.
DLLTWO.cbl This example program has an entry point "DLLTWO1" and
when compiled creates an import library.
REQUIREMENTS:
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There are no special requirements.
OPERATION:
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Animate the MAINpgm program and observe how the calls are resolved.
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