In this example, we extend our LCDRange class to include a text label. ... We have added a new constructor that sets the label text in addition to the parent and name. const char *text() const; . This function returns the label text. void setText( const char * ); . ... QLabel *label; . ... This function returns the label text. void LCDRange::setText( const char *s ) { label->setText( s ); } . ... We set the angle text label to "ANGLE". force = new LCDRange( "FORCE", this, "force" ); . ...