Calling Custom C Functions From Ada

[threestoners@yahoo.com (Brant)]

Hi Gang,

I'm trying to call a custom C function from an Ada program.  I've set
my Ada program up using the INTERFACE pragma, but I can't seem to get
the linker to locate the associated C object code.

I've written and built my C functions using Microsoft Visual C++; I've
tried both static and dynamic libraries, so I get the *.lib, *.obj
files along with a *.exp file.  I'm using a DDC-I DACS Ada compiler
under Windows NT.

When I link my Ada code, which one of the generated C files do I need
to reference?  No matter which I choose I get an "adalink: undefined
reference to `MyFunction'" error, which is the same error I get when I
don't even point to a file.  Do I need to do some tweaking of the C
files?  Do I need to reference the specific function (as opposed to
just a file) when I link?

Any help would be greatly appreciated!
Thanks,
Brant