protected override void OnResize( EventArgs eventargs )
{
base.OnResize( eventargs );
// Recompute slider range
PointF SliderTopLeft = new Point( 61, 2 );
PointF SliderBottomRight = new Point( Width-4, 16 );
m_SliderRectangle = new RectangleF( SliderTopLeft.X, SliderTopLeft.Y, 1 + SliderBottomRight.X - SliderTopLeft.X, 1 + SliderBottomRight.Y - SliderTopLeft.Y );
}