Gets the Y position of this mouse event
Please note that the Y position provided by this event parameter is always relative to the Control specified in the RelativeTo property. If the ScaleMode property is set to "PixelDelta" then all of the coordinates are relative to the last point provided.
C# Eg., g.DrawLine(Pens.Black, new Point(e.X,e.Y), new Point(e.X+2,e.Y+2));