In user agents where the default action of the wheel event is to scroll, the value MUST be the measurement along the x-axis (in pixels, lines, or pages) to be scrolled in the case where the event is not cancelled. Otherwise, this is an implementation-specific measurement (in pixels, lines, or pages) of the movement of a wheel device around the x-axis.

public double DeltaX { get; }

Public ReadOnly Property DeltaX As Double
	Get

public:
property double DeltaX {
	double get ();
}

member DeltaX : float with get