open an external file in default app from my OS

[juliano.gomes]

Hello,

I'm sorry for ask something basic like this, but i searched all day and nor sure how do it...

there are any way to open an external file in default app from my OS?

eg:

QString s = qApp->applicationDirPath() + QDir::toNativeSeparators("/PDF_file.pdf");
s.open();
// or 
s.execute();

QString s = qApp->applicationDirPath() + QDir::toNativeSeparators("/PDF_file.pdf");
s.open();
// or 
s.execute();

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many thanks!
Juliano