subclassing MainForm class

[mickey]

I resolve it changing MyWidget declaration to pointer (below coded)

class myMainForm : public MainForm
{
    Q_OBJECT
 
public:
    myMainForm( QWidget* parent = 0, const char* name = 0, WFlags fl = WType_TopLevel );
    ~myMainForm();
	void init();
        //MyWidget top
	MyWidget* top;
};

class myMainForm : public MainForm
{
    Q_OBJECT

public:
    myMainForm( QWidget* parent = 0, const char* name = 0, WFlags fl = WType_TopLevel );
    ~myMainForm();
	void init();
        //MyWidget top
	MyWidget* top;
};

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But now my problem don't chage. I do it for to do this:

myMainForm::myMainForm( QWidget* parent, const char* name, WFlags fl )
    : MainForm( parent, name, fl )
{
	printf("myMainformt\n");
	*top = MyWidget(this, "top shared", this->myWidget1);
	this->WidgetStack->addWidget(top);
}

myMainForm::myMainForm( QWidget* parent, const char* name, WFlags fl )
    : MainForm( parent, name, fl )
{
	printf("myMainformt\n");
	*top = MyWidget(this, "top shared", this->myWidget1);
	this->WidgetStack->addWidget(top);
}

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This two istruction cause some 'debug error' when I launch app....
The same if I code these two in main.cpp