Re: Using MFC dll from non-MFC application

"David Ching" <>
Sun, 11 May 2008 11:50:57 -0700
"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp> wrote in message

Here's a suggestion you might want to try, either as a permanent solution
or perhaps as an experiment to see what you can learn about the OnClose
problem. You could create a new (MFC) thread in the call from Matlab.
That's done by deriving a class from CWinThread and calling AfxBeginThread
with the class name.

The thread has an InitInstance, just like your original application did,
and all of your windows etc. would run in the new thread if you put your
original InitInstance code there. The call from Matlab would merely sit
suspended in a WaitForSingleObject until the thread exits. The advantage
is that this would get you out of undocumented territory, and it would
start your thread and message pump (the Run function) using the normal MFC
initialization code.

It's a good idea to start the secondary thread to wait for the window to
close. But I don't think it's proper behavior to call CWinApp::Run() from
the 'hook' function. That seems plain wrong. It's already been called when
the DLL was loaded and I've never seen it called again. So I would ditch
the idea of calling CWinApp::Run().

But everything else sounds good. Just move everything that was in the
CWinApp::InitInstance() to the CMyWinThread::InitInstance(), then start it
in the hook function using AfxBeginThread(), then WaitForSingleObject() of
that thread.

The reason I suggested just executing the .exe was because there was no sign
of any data passing anywhere. I guess that is done through other exported
functions that haven't been shown.

-- David

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