Prevent another instance of application from running

[galapogos]

Hi,

How can I prevent another instance of my MFC application from running? I'm using Visual Studio 2005. Thank you.

[Nikitozz]

http://www.codeguru.com/forum/archiv.../t-140185.html

[galapogos]

Thanks! I used the information here instead.

[VictorN]

Thanks! I used the information here instead.

Well, there is a "full version" of how to solve the problem: Avoiding Multiple Application Instances

[OReubens]

http://www.codeguru.com/forum/archiv.../t-140185.html

The 'instance count' in a shared data segment, while valid if implemented correctly (which it isn't here as the 'lock' and 'lock check' are independant and thus could result in a failure), is a less than ideal solution for various reasons, a shared data segment for one may not give you the desired operation when running on a terminal server or when using fast user switching.

Using a mutex (either global or local) remains to be simple and more guaranteed to work properly under all conditions.

At least none seem to be suggesting the window approach. that's just really major fail trying to solve it that way :-p