1. A scroll control method using a touchpad, comprising the steps of: predefining a region on the touchpad for controlling a scroll function on a window interface, the region being disposed on the touchpad adjacent a second region for cursor control within the window interface; detecting a landing of an object on the region; triggering the scroll function in response to the landing; detecting a movement of the object sliding on the touchpad subsequent to the landing, maintaining the scroll function upon continued sliding of the object into the second region; calculating a distance of the movement for determining a scrolling signal responsive thereto; and terminating the scroll function in response to a leaving of the object from the touchpad.