A HBox is a container where all children are layed out in columns.
Parameters: LandWidget * base
Parameters: LandWidget * base, LandWidget * add
Parameters: LandWidget * base, LandWidget * rem
Parameters: LandWidget * base, int n
Parameters: LandWidget * base, LandWidget * parent, int x, int y, int w, int h
Parameters: LandWidget * parent, int x, int y, int w, int h
Returns: LandWidget*
no parameters