Re: I want to pass a complex data type (class) to my COM component. Neat way of doing this?

From:

"Alexander Nickolov" <agnickolov@mvps.org>

Newsgroups:

microsoft.public.vc.mfc,microsoft.public.vc.atl

Date:

Wed, 23 Jan 2008 13:34:51 -0800

Message-ID:

<#WZKTegXIHA.6044@TK2MSFTNGP05.phx.gbl>

I'd also suggest looking at Marshal-By-Value (MBV). See Chris
Sells' framework here:

http://www.sellsbrothers.com/tools/#atlmbv

Not sure why you are posting to the general MFC group as well,
but be advised this is for ATL, not MFC...

--
=====================================
Alexander Nickolov
Microsoft MVP [VC], MCSD
email: agnickolov@mvps.org
MVP VC FAQ: http://vcfaq.mvps.org
=====================================

"Simon L" <silangdon@hotmail.com> wrote in message
news:116aef09-3e6e-4254-b9d8-5b51ee15f15a@y5g2000hsf.googlegroups.com...

Because I want my app. to support multiple customers who have slightly
different requirements, I want to put a chunk of code in a dll, eg a
COM object, pass my class containing the data to it and have the dll
process it.

I've been adding ATL COM components to my app. for a while, and there
are a limited number of datatypes supported by the wizard (and if you
try to define your own the compiler doesn't like the undefined class
and the idl file doesn't support C++ syntax does it? I tried defining
a class it it baulked at the idea anyway).

So, pass things as void* and cast?

Thanks.