Re: how to export "DllCanUnloadNow" (prototypied in objbase.h) without .DEF file

From:
"Ben Voigt [C++ MVP]" <rbv@nospam.nospam>
Newsgroups:
microsoft.public.vc.language
Date:
Thu, 13 Mar 2008 15:31:47 -0500
Message-ID:
<OLt6fjUhIHA.5208@TK2MSFTNGP04.phx.gbl>
Mario Semo wrote:

Igor,

You could use /EXPORT linker option, either specified in your
project or introduced in the source code via #pragma comment.


Ah, this is interesting.

So i tried:

STDAPI DllCanUnloadNow()
{
return 0;
}

#pragma comment(linker, "/EXPORT:DllCanUnloadNow")

since the documentation to /EXPORTS says:

Do not specify the decorated form of C identifiers that are declared
__cdecl or __stdcall.

But this results in:

dll2.obj : warning LNK4104: export of symbol 'DllCanUnloadNow' should
be PRIVATE
  Creating library dll2.lib and object dll2.exp
dll2.exp : error LNK2001: unresolved external symbol DllCanUnloadNow
dll2.dll : fatal error LNK1120: 1 unresolved externals

mh?

then i tried the decorated form:

#pragma comment(linker, "/EXPORT:_DllCanUnloadNow@0")

and now i looks as it is ok.

comments?


But now the name is wrong, when COM looks for "DllCanUnloadNow" with
GetProcAddress, it won't find it.

thx a lot for your help!

mario

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