Re: Using MFC dll from non-MFC application

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>
Sun, 11 May 2008 14:16:33 -0400
"JRGlide" <> wrote in message

If I have to I can get around the problem by keeping it as an exe, but
modify it to pass data through some sort of shared memory. This is
that I can access global shared memory through the non-MFC calling
I still need to read up on how to do that. It just seems like the dll
approach should work...

The original application was a viewer for 3D laser point cloud data using
Open GL. I now want to allow other applications such as MATLAB or LabView
be able to call it directly. They may be passing millions of points
Meg of data, or more). I thought converting it to a dll was the best
approach. Otherwise I have to write a wrapper for any other program that
wants to use it, but maybe that is what I need to do.

BTW, I've tried linking it both statically and dynamically. Dynamically
crashed when loading instead of closing! I also tried converting it to a
non-Doc/View app and it also crashes.

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.

Scott McPhillips [VC++ MVP]

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