To provide means that can easily realize setting of an optimum pointer movement even in an environment with a limited area for movement of a mouse itself.

When a user moves the mouse on an operating surface to generate vector information, what unit vector it corresponds to is calculated, and the calculated value N is multiplied by a unit vector movement V' of a pointer stored in a unit vector movement storage part to produce a pointer movement L=N×V'. The movement L is input into a pointer position updating part to change the display position of the pointer. If a lift of the mouse off the operating surface is detected in the moving operation, the unit vector movement V' stored in the unit vector movement storage part is increased by a constant value V". Although the pointer moving operation is repeated after the mouse is brought again into contact with the operating surface, even if the movement of the mouse itself is the same as the preceding one, the pointer is moved largely by N×V".

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