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Implementing Single Instance Applications

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Submitted on: 1/4/2015 9:39:00 PM
By: NDawg (from psc cd)  
Level: Beginner
User Rating: By 3 Users
Compatibility: C, C++ (general), Microsoft Visual C++, Borland C++
Views: 820
 
     This shows you how to create a sure-fire one instance appliction WITHOUT GUI, API, or MFC! This can create a single instance DOS app as well as make your current GUI projects single instance. What's better is that this does not use FindWindow which is not reliable. It also uses CreateMuteX... an atom kernel function. This means that there is no possible way that another program could execute before it creates it's token in kernel memory. You are probably thinking this will be hundreds of lines of code... think again, it's only 16 lines of code in one function. I don't believe this will work in anything other than Windows, but you can try.
 
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