prob with keyPressEvent()

[Askar]

Dear Friends,
I need to filter Esc key in Dialogs, i had reimplemented keyPressEvent(QKeyEvent *) just below,
but its not working

void myCLass::keyPressEvent(QKeyEvent *e)
{
    if(e->key()==Qt::Key_Escape)
    {
        e->ignore();
    }
    else
    {
        QDialog::keyPressEvent(e);
    }
}

void myCLass::keyPressEvent(QKeyEvent *e)
{
    if(e->key()==Qt::Key_Escape)
    {
        e->ignore();
    }
    else
    {
        QDialog::keyPressEvent(e);
    }
}

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i have set Focus Policy in my dialog object

win = new QDialog(this);
win->setFocusPolicy(Qt::StrongFocus);

win = new QDialog(this);
win->setFocusPolicy(Qt::StrongFocus);

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can any body help me t o fix this problem