By default, the VerticalScrollWheel property is 1.0. The VerticalScrollWheel property determines the distance to scroll using the mouse wheel by multiplying the value with the height of the current font, if the value is positive, else if the value is negative it indicates a fixed distance. The Font property indicates the control's font. Use the VerticalScrollWheel property to programmatically specify the increment to scroll the control's content by rotating the mouse wheel. The VerticalScrollWheel property on 0, indicates that no scroll is performed when user rotates the mouse wheel.