Re: Question on COM_INTERFACE_ENTRY

From:

"Igor Tandetnik" <itandetnik@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 21 Sep 2007 07:59:00 -0400

Message-ID:

<u9J$TbE$HHA.2004@TK2MSFTNGP06.phx.gbl>

"Mash" <mashman74@hotmail.com> wrote in message
news:1190375503.170737.179800@d55g2000hsg.googlegroups.com

For the following

BEGIN_COM_MAP(I_Command)
       COM_INTERFACE_ENTRY(ICommand)
       COM_INTERFACE_ENTRY(IDispatch)
       COM_INTERFACE_ENTRY(IConnectionPointContainer)
       COM_INTERFACE_ENTRY_IMPL(IConnectionPointContainer)
END_COM_MAP()

I get the error
error C2440: 'static_cast' : cannot convert from
'I_Command::_ComMapClass *' to 'IDispatch *'

It means your class doesn't derive from IDispatch.

It worked fine in VS6 but fails after converting to VS2005. It turns
out that there is already an ICommand interface defined in oledb.h
which is part of the VS2005 SDK.

How can I specify to use MY ICommand instead of the one in oledb??

Include the header defining your interface, don't include oledb.h
--
With best wishes,
Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925