will Qt delete all dynamic data?

[somename]

Ok, and one more question.
I have mainWidget, that contain several other widget (window),
and when I do following code, on my mainWidget I see other widget... I don't want that it show on mainWidget..

class MainWidget : public QMainWidget
{
    Q_OBJECT
public:
    MainWidget()
    {
        myForm = new MyForm(this);
    }
 
private:
    MyForm *myForm;
 
}

class MainWidget : public QMainWidget
{
    Q_OBJECT
public:
    MainWidget()
    {
        myForm = new MyForm(this);
    }
    
private:
    MyForm *myForm;

}

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How to do myForm as a child without showing on MainWidget?