Thanks for the answers. And even though it seems basic, the question is much more complex. Pretend:
_____
class Person
{
...
// Anything that a class will have goes here
}
_____

To instantiate this class I must do:

Person myPerson = new Person();


I couldn't do:

Person myPerson;


Base on this example does it mean that QWidget is a regular class, a struct or what?