connect

[mickey]

I I have code this below but I have and error on 1th connect

mywidget.cpp(113): error C2664: 'bool QObject::connect(const QObject *,const char *,const QObject *,const char *)' : cannot convert parameter 3 from 'myMainForm *' to 'const QObject *'

mywidget.cpp(113): error C2664: 'bool QObject::connect(const QObject *,const char *,const QObject *,const char *)' : cannot convert parameter 3 from 'myMainForm *' to 'const QObject *'

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//constructor of MyWidget class
 w = (MainForm*)this->topLevelWidget();
 myw= (myMainForm*)this->topLevelWidget();
connect(this, SIGNAL(myUpdate()), myw, SLOT(myUpdateWidgets()) );
connect(this, SIGNAL(myUpdate()), w, SLOT(updateWidgets()) );

//constructor of MyWidget class
 w = (MainForm*)this->topLevelWidget();
 myw= (myMainForm*)this->topLevelWidget();
connect(this, SIGNAL(myUpdate()), myw, SLOT(myUpdateWidgets()) );
connect(this, SIGNAL(myUpdate()), w, SLOT(updateWidgets()) );

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class MyWidget {
  MainForm* w;		
  myMainForm* myw;
}

class MyWidget {
  MainForm* w;		
  myMainForm* myw;
}

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The 2nd connect works properly; Why this error on 1th? Isn't it the same? Thanks