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detect multiple instances of an application bkelly1310-Dec-12 12:28 bkelly13 10-Dec-12 12:28  Visual Studio 2008, MFC, C++ Is there a determine if, as a program starts, it is already running one or more times. Not has run, but is currently already running? Thanks for your time Re: detect multiple instances of an application Pete O'Hanlon10-Dec-12 12:31 Pete O'Hanlon 10-Dec-12 12:31  There's a really good example here[^]. *pre-emptive celebratory nipple tassle jiggle* - Sean Ewington "Mind bleach! Send me mind bleach!" - Nagy Vilmos CodeStash - Online Snippet Management | My blog | MoXAML PowerToys | Mole 2010 - debugging made easier Re: detect multiple instances of an application bkelly1310-Dec-12 13:38 bkelly13 10-Dec-12 13:38  Yes, that is a good article. I just wanted to know how many copies have already been started so the code could avoid putting all the opwninf dialogs on top of each other. I will elect to not add that complexity and let the user deal with it. Thanks for taking the time to reply. Thanks for your time Re: detect multiple instances of an application H.Brydon31-Dec-12 20:09 H.Brydon 31-Dec-12 20:09  If you want to be able to count instance hits, have a look at the shared memory option here.[^] This article also shows some other techniques which I think fix some of the problems described in Joe Newcomer's article first referenced above. I have used the shared memory technique to inhibit multiple instances of a program as well as manage some common data in a program where I allow multiple instances. [I have a lot of respect for the technical output of both of these authors.] -- Harvey

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