Question about definition files and DLLs

[Paul Surgeon]

I wrote a DLL (using free Borland C++ 5.5 compiler) and the app that calls
it would keep crashing until I found a definition file for my project.

All the definition file contains is :

EXPORTS
Linkage=_Linkage
ImportTable=_ImportTable

Those structures were already exported from my code using :
extern "C" __declspec (dllexport) ImportStructure ImportTable;

What's up with the underscores and how does it work?
How did it fix the DLL interface?

Thanks
Paul

 

[Victor Bazarov]

I wrote a DLL (using free Borland C++ 5.5 compiler) and the app that calls
it would keep crashing until I found a definition file for my project.

All the definition file contains is :

EXPORTS
Linkage=_Linkage
ImportTable=_ImportTable

Those structures were already exported from my code using :
extern "C" __declspec (dllexport) ImportStructure ImportTable;

What's up with the underscores and how does it work?
How did it fix the DLL interface?

Neither DLLs nor the "definition file" are defined by the C++ language.
They are platform-specific, and as such are off-topic here. Your
question is better asked in comp.os.ms-windows.programmer.

Victor

 

[Paul Surgeon]

Ah thanks.
I always seem to use the wrong newsgroup. :-$

Paul