Re: How do I ensure only one version of my executable is running

From:

"Tom Serface" <tom.nospam@camaswood.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 8 Mar 2007 13:37:52 -0800

Message-ID:

<E4A3356D-90DB-440A-B17E-E9C20775EF6E@microsoft.com>

I've had great success with PJ's CSingleInstance class and it does not use
FindWindow() as part of the solution. That's why I always recommend it. I
also like how easy it is to pass the command line from one instance to
another.

http://www.naughter.com/sinstance.html

I understand how the class works (I have had to modify it slightly for my
solutions from time to time), but it's another one of those complex things
that I don't have to think about much now that it just works. This
solution uses a memory mapped file that can be accessed by all instances.

Tom

"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message
news:q6o0v2pgmcd2a3n9h0djmgrfqckep6jc55@4ax.com...

This solution, which keeps getting promulgated as if it could actually
ever work, is
simply wrong; I know it is wrong because I have seen it fail, solidly.
See my essay on my
MVP TIps site. You CANNOT rely on FindWindow because of intrinsic race
conditions that
exist! The ONLY reliable way is to create a named kernel object, such as
an even, mutex,
or semaphore.

One of my successes was in getting the MSDN article that gave this
algorithm FINALLY
removed from the MSDN, because it is completely erroneous! It cannot
work, does not work,
and I have seen it fail.
joe
On Thu, 08 Mar 2007 12:33:41 GMT, changliw@online.microsoft.com (Charles
Wang[MSFT])
wrote: