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
3  1382 
check the calling conventions in the Delphi dll make sure they are stdcall
and that should fix it.
"Dan" <pr*******@yahoo.comwrote in message
news:L5******************************@comcast.com. ..
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
Thanks Mark, but that doesn't appear to be the problem as all functions are
indeed defined as stdcall.
"Mark Anthony Gohara" <mg*****@partssource.com.comwrote in message
news:uu**************@TK2MSFTNGP06.phx.gbl...
check the calling conventions in the Delphi dll make sure they are stdcall
and that should fix it.
"Dan" <pr*******@yahoo.comwrote in message
news:L5******************************@comcast.com. ..
>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
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.
"Dan" <pr*******@yahoo.comwrote in message
news:O-******************************@comcast.com...
Thanks Mark, but that doesn't appear to be the problem as all functions
are indeed defined as stdcall.
"Mark Anthony Gohara" <mg*****@partssource.com.comwrote in message
news:uu**************@TK2MSFTNGP06.phx.gbl...
>check the calling conventions in the Delphi dll make sure they are
stdcall and that should fix it.
"Dan" <pr*******@yahoo.comwrote in message
news:L5******************************@comcast.com ...
>>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
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