Re: Visual Studio 2005 include file error

From:

"Alex Blekhman" <xfkt@oohay.moc>

Newsgroups:

microsoft.public.vc.language

Date:

Wed, 21 Feb 2007 16:23:33 +0200

Message-ID:

<ur$jfPcVHHA.392@TK2MSFTNGP06.phx.gbl>

"Roberto Baggio" wrote:

I have ported a 32 bit module to 64 bit. It does database
and e-mail, and requires the inclusion of mapi and sql
header files. These header files are pulled in from the
platform SDK inclusion directory of Visual Studio 2005.
So, Visual Studio 2005 has the following:

MAPIDEFS.H declares:
typedef ULONG BOOKMARK;

SQLTYPES.H declares:
typedef SQLULEN BOOKMARK;

This worked fine in 32 bit because SQLULEN was typed as
unsigned long. Under 64 bit, it is typed as UINT64.

Of course, my module will not compile, without error, as a
64 bit application because of the redefinition of BOOKMARK

Can someone suggest an elegant way of getting around this
use of the same type name that is based on a different
type? Either I'm missing something obvious/easy, or this
change wasn't thought out properly.

You can make two distinct namespaces for these components:

namespace SQL
{
#include "SQLTYPES.H"
}

namespace MAPI
{
#include "MAPIDEFS.H"
}

....

SQL::BOOKMARK b1;
MAPI::BOOKMARK b2;

This way you can avoid ambiguity of names.

HTH
Alex