Public Property PageNumber As Integer

Dim instance As PrintBackgroundEventArgs
Dim value As Integer
 
instance.PageNumber = value
 
value = instance.PageNumber

public int PageNumber {get; set;}

protected void FpSpread1_PrintBackground(object sender, FarPoint.Web.Spread.PrintBackgroundEventArgs e)
        {
            ListBox1.Items.Add(e.PageNumber.ToString());
        }

Protected Sub FpSpread1_PrintBackground(sender As Object, e As FarPoint.Web.Spread.PrintBackgroundEventArgs) Handles FpSpread1.PrintBackground
      ListBox1.Items.Add(e.PageNumber.ToString())
End Sub