Re: member function level dll export

From:

"Doug Harrison [MVP]" <dsh@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Thu, 24 Apr 2008 14:52:55 -0500

Message-ID:

<42p114lknl5fk6htogmnga3plvgriddumn@4ax.com>

On Thu, 24 Apr 2008 12:40:18 -0700 (PDT), qdin <eryqdin@gmail.com> wrote:

Hi.

I was wondering how member function level dll exporting works.
I have an interface, and before each function I put the
declspec(dllexport) tag,
and then I implement this class in CFoo, without the declspec tag.

I compile this into a dll, and everything works fine (I can call each
function properly etc).
But when I run this dll through depends.exe, or dumpbin.exe with the /
EXPORTS flag,
nothing shows up (only static functions show up).

How is it doing this linking?
Thanks in advance,
Eric

#define DLLEXPORT __declspec(dllexport)
struct IFoo
{
  virtual DLLEXPORT Func1()=0;
  virtual DLLEXPORT Func2()=0;
  virtual DLLEXPORT Func3()=0;
}

They don't show up in depends because you don't define them. Give these
pure virtual functions bodies, and they will show up in depends. Of course,
you normally wouldn't define pure virtual functions in the class that
introduces them, and thus, there's no reason to dllexport them.

--
Doug Harrison
Visual C++ MVP