protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button == MouseButtons.Left)
{
Capture = true;
if (Scroll != null) Scroll(this, new ScrollEventArgs(ScrollEventType.ThumbTrack, trackerValue));
if (ValueChanged != null) ValueChanged(this, new EventArgs());
OnMouseMove(e);
}
}