Gets or sets the index of the first visible item in the control.
public int TopIndex { get; set; }
<BrowsableAttribute(False)>
Public Property TopIndex As Integer
The index of the first visible item in the control.
Initially, the item with the index position of zero (0) is at the top of the RasterImageList control. If the RasterImageList control contents are scrolled, a different item can be at the top of the control. You can use this property to determine which item is visible at the top of the RasterImageList control. To position a specific item in the visible region of the control, set its index to the TopIndex property.
For an example, refer to ScrollStyle
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