How to draw a chart with OWC in asp.net (2)

OWC.aspx.vb:
Imports System
Imports OWC
Imports System.Web.UI
Public Class OWC
Inherits System.Web.UI.Page
Protected WithEvents Chartholder as System.Web.UI.WebControls.PlaceHolder
#Region the code generated by the Web Forms Designer
' This call is required by the Web Forms Designer.
<system.diagnostics.debuggerstepthrough () > Private Sub InitializeComponent ()
End Sub
Private Sub Page_Init (ByVal sender as System.Object, ByVal e as System.EventArgs) Handles Mybase.init
' CodeGen: This method call is required by the Web Forms Designer
' Do not modify it using the Code Editor.
InitializeComponent ()
End Sub
#End Region
Private Sub Page_Load (ByVal sender as System.Object, ByVal e as System.EventArgs) Handles MyBase.Load
' The user code to place the initialization page here
' Create a ChartSpace object to place the chart
Dim objcspace as ChartSpace = New Chartspaceclass ()
' Add a chart to the ChartSpace object, the Add method returns the chart object
Dim objchart as WCChart = OBJCSPACE.CHARTS.ADD (0)
' Specifies the type of chart. Type is obtained by Owc.chartcharttypeenum enumeration value
Objchart.type = chartcharttypeenum.chcharttypecolumnclustered
' Specify whether the chart needs a legend