'宣言 Protected Overridable Function OnManipulationDelta( _ ByVal position As Point, _ ByVal isTouch As Boolean, _ ByVal scale As Double, _ ByVal translationX As Double, _ ByVal translationY As Double, _ ByVal isInertial As Boolean _ ) As Boolean
protected virtual bool OnManipulationDelta( Point position, bool isTouch, double scale, double translationX, double translationY, bool isInertial )