The display size of a window as an object can be arbitrarily changed by simple operation without dragging a mouse. When an object on the display screen is designated by pressing a mouse button of an input device, a CPU changes the size of the designated object by gradually enlarging or reducing its size...http://www.google.ca/patents/US6501487?utm_source=gb-gplus-sharePatent US6501487 - Window display controller and its program storage medium
