How to access the "?" menu button in QWidget

[anda_skoa]

QDialog inherits QWidget, right?

Correct

Now I have a menubutton wich looks like "?", which certainly means "help" or "about".

Without screenshot this is a guess, but this could be a "What's This" button.

See QWhatsThis.

Usually that would not be enabled by default though, maybe you entered some what's this data for the dialog or some of its widgets?

Cheers,
_