Gets or sets a value to be added to or subtracted from the TrackBar.Value property when the scroll box is moved a large distance.
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When the user presses the PAGE UP or PAGE DOWN key or clicks the track bar on either side of the scroll box, the TrackBar.Value property changes according to the value set in the TrackBar.LargeChange property. You might consider setting the TrackBar.LargeChange value to a percentage of the Control.Height (for a vertically oriented track bar) or Control.Width (for a horizontally oriented track bar) value. This keeps the distance your track bar moves proportionate to its size.