Re: function won't work inside MFC dialog class

From:
"Tom Serface" <tserface@msn.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Thu, 22 Jun 2006 06:36:41 -0700
Message-ID:
<eDLZoDglGHA.4076@TK2MSFTNGP05.phx.gbl>
If you are changing the variable that exits the loop from somewhere else in
the class (an event handler for example) remember that messages won't get
handled unless the loops gives up some time (Sleep() perhaps) You will also
want to make the variable that gets modified a "volatile" type so that the
optimizer will know that the variable could be changed elsewhere.

If you're going to do a tight loop, you may want to put it in a worker
thread if you are not already doing so.

Tom

"Z.K." <nospam@nospam.net> wrote in message
news:%23AfIK3blGHA.1240@TK2MSFTNGP05.phx.gbl...

Frank Hickman [MVP] wrote:
I have one last question; hopefully. I have an inifinte while loop inside
the function of a button which reads a sensor connected to through a USB
cable which then prints the value to a text label on my form. This works
great, but now I can't seem to break out of the loop. I tried using a bool
variable and trapping the enter and escape key to change the variable so
that it would exit the loop, but once the button is pressed, it has
complete control because of the infinite loop and I can't seem to figure
out a good way to break out of the loop. Any ideas on that? I suppose
that I should use a thread to do this, but I was wondering if there was a
quick way to jump out of the while look if I say hit return or the escape
key or any other method that you might know of.

   Z.K.

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