How to exclude a specific file extension from QDir::entryList

[franco.amato]

Hi community,
I know how to specify the file extensions that I would like to be considered when I call the QDir::entryList method:

QDir dir(path);
QStringList files = dir.entryList(QStringList() << "*.ext1" << "*.ext2", QDir::Files | QDir::NoDot | QDir::NoDotAndDotDot);

QDir dir(path);
QStringList files = dir.entryList(QStringList() << "*.ext1" << "*.ext2", QDir::Files | QDir::NoDot | QDir::NoDotAndDotDot);

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In this case the files having extensions ext1 and ext2 only are considered. But how to exclude a specific extension?
For example I would like to considere ALL the extensions except a specific one ( in my case *.conf )

Thx