Re: WM_COPYDATA question

From:
"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 1 Jul 2008 17:36:55 -0400
Message-ID:
<#fWFYK82IHA.784@TK2MSFTNGP04.phx.gbl>
WM_COPYDATA can only be sent to a window, not a thread.

Yes, processA can post a message to processB. But that only passes two
32-bit parameters, not a variable length memory buffer.

"Nick Schultz" <nick.schultz@flir.com> wrote in message
news:%23l2K8z72IHA.4448@TK2MSFTNGP05.phx.gbl...

Also, can a thread in processA post a message to a thread in process B?

"Nick Schultz" <nick.schultz@flir.com> wrote in message
news:%23o7mIw72IHA.4988@TK2MSFTNGP06.phx.gbl...

so do I still need to create a window within the thread?

or can I just have the threadproc simply be this:

threadproc(){

   while( (bRet = GetMessage( &msg, NULL, 0, 0 )) != 0)
   {
       if (bRet == -1)
       {
           // handle the error
       }
       else
       {
             //handle the message
       }
   }

}

Nick

"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message
news:421l645nlohtm25vpcjhb6eqp3u9efnp1e@4ax.com...

This is why I suggested one thread per client process; if a process
blocks the
WM_COPYDATA, which (as already pointed out) can only be sent via
SendMessage, the other
clients don't suffer.
joe

On Tue, 1 Jul 2008 10:15:28 -0700, "Nick Schultz"
<nick.schultz@flir.com> wrote:

Can you send WM_COPYDATA messages asynchronously? For example, using
postmessage() instead of sendmessage()?


Joseph M. Newcomer [MVP]
email: newcomer@flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm


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Scott McPhillips [VC++ MVP]

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