Re: Worker thread and posted message

From:
David Wilkinson <no-reply@effisols.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Thu, 07 Jun 2007 15:21:59 -0500
Message-ID:
<O0pXhkTqHHA.3492@TK2MSFTNGP02.phx.gbl>
Joseph M. Newcomer wrote:

I handle this by assigning a "virtual row ID". The reason is that in effect you don't
know that the item number is to insert it in the actual control (this would require
cross-thread SendMessage), so what you do is work with item numbers of your own invention.
I often just store the virtual item number in the LPARAM of the item (or in a data
structure pointed to by LPARAM, depending on what I'm doing), and use it to index the
subitems (I use a similar technique for tree controls with virtual HTREEITEM values). When
you receive the message, you look up the item based on its virtual ID, and this gives you
the actual item ID.


Hi Joe:

Not to push your buttons or anything, but SendMessage() can handle this
situation very easily (by returning the index of the added item). It
allows you to avoid the use of "new" also.

But, now that I read the OP's question properly, why not just pass all
the information in one message, using PostMessage() or SendMessage() as
you prefer?

--
David Wilkinson
Visual C++ MVP

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