Ok, thanks for the reply. I got the QWidget part ( According to Qt Assistant, QDialog inherits QWidget, so the latter is automatically available when QDialog is included)

**Damn! Why didn't I check Qt Assistant before asking?? Sorry about that.**

But I'm still confused about the QStringlist part. You said that QWidget inherits QFont( which further inherits QString and QStringlist), but nothing such is mentioned in the reference document of QWidget. In fact, I checked the reference document of QStringlist and to my surprise, this class is not inherited by any other class.

So what now mate?