Re: Problem with PostThreadMessage with date time activex control

From:
David Wilkinson <no-reply@effisols.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Thu, 26 Jul 2007 12:54:53 -0400
Message-ID:
<OoIsuW6zHHA.3600@TK2MSFTNGP04.phx.gbl>
Hari wrote:

Hello,

I'm getting a problem with a PostThreadMessage call within a MFC application.

The PostThreadMessage receive handler is implemeneted in the application
class(CWinAPP derived class) with ON_THREAD_MESSAGE handler as :

ON_THREAD_MESSAGE(WM_DSEXECEVENTHANDLER, ExecuteEventHandler)

The PostThreadMessage is invoked from a different thread on a basis of
certain events and this scenario works except one case:

The application is build in with a datetime activex control in a dialogbox
within the same application. If I open this activex control at the same time,
when the PostThreadMessage happens, the receive handler doesn't get executed.
Also I have checked the return value of the PostThreadMessage call and it
returns without any error message. I guess the message is getting posted in
the thread queue, for some reason it is not being consumed during the activex
control runtime?

Appreciate any inputs on this...


Hari:

Never use PostThreadMessage() to a thread that has windows. Use
PostMessage() to one of its windows instead.

Why not? You just found out why not :).

--
David Wilkinson
Visual C++ MVP

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