Re: Win32 DLL def file question

From:

David Connet <stuff@agilityrecordbook.com>

Newsgroups:

microsoft.public.vc.mfc,microsoft.public.dotnet.languages.vc,microsoft.public.dotnet.languages.vc.libraries

Date:

Fri, 08 Aug 2008 01:48:00 GMT

Message-ID:

<kBNmk.35222$ZE5.21223@nlpi061.nbdc.sbc.com>

"Ben Voigt [C++ MVP]" <rbv@nospam.nospam> wrote in
news:OxLGptJ#IHA.2060@TK2MSFTNGP05.phx.gbl:

Cholo Lennon wrote:

Kid wrote:

Hi

How can we export Win32 dll functions for dynamically LoadLibrary
and GetProceeAddress ?

I see VS MFC DLL project has a def file but Win32 DLL does not have
one, should we add a def file to VS Win32 DLL project , how can I
do
that ?

Thank you .

There is another method to export functions apart from def file:
keyword __declspec(dllexport)

But if you want control over the exported names (no mangling) then you
must use a .def file.

Not necessarily. Inside my dll cpp file, I have:
  extern "C" __declspec(dllexport) IMyInterface* GetMyInterface()
  {
     return new MyInterfaceImpl();
  }

No def file in sight. (Well, actually there is - but there are no exports
in it - I think I just forgot to remove it after using the wizard to
create the project)

To get the interface:
  GETMYINTERFACE func = reinterpret_cast<GETMYINTERFACE>(GetProcAddress
(m_hDllInst, "GetMyInterface"));

where GETMYINTERFACE (defined in the header with IMyInterface) is:
  typedef IMyInterface* (*GETMYINTERFACE)();

Now, if you want to specifically export a function at a set ordinal (is
that still possible, or am I just having win16 flashbacks?), you need a
def file.

Dave Connet