Problem with DLL created in Delphi

[Dan]

Hi all,

I have a DLL built in Delphi 7 that has a few functions for extracting data
from some b-tree database tables. Everything works great when called by a
test app written in Delphi, yet when the same functions are called from a C#
production application, a couple of the extracts are returning no data, or
fewer records than I receive when called by the test application.

Any ideas why this would be the case? I can't debug the DLL from Visual
Studio that I'm aware of, so it's essentially a "black box" as far as VS is
concerned, but when testing and debugging from Delphi, everything works
perfectly.

I'm stumped.

TIA,
Dan

 

[Mark Anthony Gohara]

check the calling conventions in the Delphi dll make sure they are stdcall
and that should fix it.

 

[Dan]

Thanks Mark, but that doesn't appear to be the problem as all functions are
indeed defined as stdcall.

 

[Mark Anthony Gohara]

You could convert the dll into a COM object and try it that way. Also have
you set the C# application to use unsafe code. Actually the assembly calling
the dll to use unsafe code.