Deploying a QApplication inside a DLL -> platform plugin not found even if here

[Aria-dvp]

The solution was simple, thanks to hskoglund on this thread [link]. Here the quote :

[...] add the path to the Qt files yourself via some C++ code, this has to be done before QApplication's constructor (because that's where the plugin loading occurs), say like this:

...
QCoreApplication::addLibraryPath("C:/Project folder");
QApplication a(argc,argv);
...

...
QCoreApplication::addLibraryPath("C:/Project folder");
QApplication a(argc,argv);
...

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