Public Default Property Item( _
   ByVal index As Integer _
) As Object

Dim instance As FpScrollBarButtonCollection
Dim index As Integer
Dim value As Object
 
instance.Item(index) = value
 
value = instance.Item(index)

public object this[ 
   int index
]; {get; set;}

FarPoint.Win.Spread.FpScrollBarButtonCollection buttons = new FarPoint.Win.Spread.FpScrollBarButtonCollection();
buttons.AddRange(new FarPoint.Win.Spread.FpScrollBarButton[] {
            new FarPoint.Win.Spread.FpScrollBarButtonBackwardLine(),
            new FarPoint.Win.Spread.FpScrollBarComboThumb(),
            new FarPoint.Win.Spread.FpScrollBarButtonForwardLine()});
for (int i = 0; (i <= (buttons.Count - 1)); i++) {
    MsgBox(buttons.Item[i].ToString());
}
fpSpread1.VerticalScrollBar.Buttons = buttons;

Dim buttons As New FarPoint.Win.Spread.FpScrollBarButtonCollection
buttons.AddRange(New FarPoint.Win.Spread.FpScrollBarButton() {New FarPoint.Win.Spread.FpScrollBarButtonBackwardLine(), New
FarPoint.Win.Spread.FpScrollBarComboThumb(), New FarPoint.Win.Spread.FpScrollBarButtonForwardLine()})
For i As Integer = 0 To buttons.Count - 1
MsgBox(buttons.Item(i).ToString())
Next
FpSpread1.VerticalScrollBar.Buttons = buttons