or
Private Sub Table1_NeedDataSource(sender As Object, e As System.EventArgs) Handles Table1.NeedDataSource Dim tbl As Telerik.Reporting.Processing.Table = TryCast(sender, Processing.Table) Dim obj As Object = tbl.Report.ReportHeader ' Dim sect As Processing.ReportSection = TryCast(Processing.ElementTreeHelper.GetChildByName(tbl.Report, "ReportHeaderSection1"), Processing.ReportSection)End Sub<Window x:Class="MCCHomeWork.Main" xmlns:vm="clr-namespace:MCCHomeWork" xmlns:trr ="http://schemas.telerik.com/wpf" Title="Main" Height="300" Width="529"> <Grid Name="MyGrid"> <trr:ReportViewer Name="rep1"/> <Button Content="Click" Name="button3" Width="75" Height="100" Click="button3_Click" /> </Grid></Window><trr:ReportViewer Name="rep1"/>