How to limit 32-bit applications to one instance in Visual C++ (with or without Qt)

I use the code from the following article to allow only a single instance of my programs (mostly written using Qt Framework) to run on Windows. Some programs (specially the ones which connect to a specific type of hardware or resource) need this limitation to avoid conflicts.

Please also note that this code is specific to Windows.

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Build Qt-Static using MSVC2010

I keep the following notes (steps) as a personal guideline for building Qt Statically using Microsoft Visual C++ and I never fail to do it but please keep in mind that these are NOT some exact steps and they need to be changed (slightly though 🙂 ) in some cases. Leave comments if you have any questions.

I have used Qt 5.4.0 with Microsoft Visual C++ 2010 (MSVC2010) but it is more or less the same for similar compilers and others Qt versions.

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