i can't figure out how to set my own homepage for a tabbed webbrowser. here is the code i have so far. any help?

vb.net Code:
  1. Public Class Form1
  2.     Dim int As Integer = 0
  3.  
  4.     Private Sub Loading(ByVal sender As Object, ByVal e As Windows.Forms.WebBrowserProgressChangedEventArgs)
  5.         ToolStripProgressBar1.Maximum = e.MaximumProgress
  6.         ToolStripProgressBar1.Value = e.CurrentProgress
  7.     End Sub
  8.  
  9.     Private Sub Done(ByVal sender As Object, ByVal e As Windows.Forms.WebBrowserDocumentCompletedEventArgs)
  10.         TabControl1.SelectedTab.Text = CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).DocumentTitle
  11.         ComboBox1.Text = CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).Url.ToString
  12.     End Sub
  13.  
  14.     Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
  15.         Dim browser As New WebBrowser
  16.         TabControl1.TabPages.Add("New Page")
  17.         browser.Name = "Web Browser"
  18.         browser.Dock = DockStyle.Fill
  19.         TabControl1.SelectedTab.Controls.Add(browser)
  20.         AddHandler browser.ProgressChanged, AddressOf Loading
  21.         AddHandler browser.DocumentCompleted, AddressOf Done
  22.         int = int + 1
  23.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).GoHome()
  24.     End Sub
  25.  
  26.     Private Sub AddTabToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AddTabToolStripMenuItem.Click
  27.         Dim browser As New WebBrowser
  28.         TabControl1.TabPages.Add("New Page")
  29.         TabControl1.SelectTab(int)
  30.         browser.Name = "Web Browser"
  31.         browser.Dock = DockStyle.Fill
  32.         TabControl1.SelectedTab.Controls.Add(browser)
  33.         AddHandler browser.ProgressChanged, AddressOf Loading
  34.         AddHandler browser.DocumentCompleted, AddressOf Done
  35.         int = int + 1
  36.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).GoHome()
  37.     End Sub
  38.  
  39.     Private Sub RemoveTabToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RemoveTabToolStripMenuItem.Click
  40.         If Not TabControl1.TabPages.Count = 1 Then
  41.             TabControl1.TabPages.RemoveAt(TabControl1.SelectedIndex)
  42.             TabControl1.SelectTab(TabControl1.TabPages.Count - 1)
  43.             int = int - 1
  44.         End If
  45.     End Sub
  46.  
  47.     Private Sub WebsitePropertiesToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles WebsitePropertiesToolStripMenuItem.Click
  48.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).ShowPropertiesDialog()
  49.     End Sub
  50.  
  51.     Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
  52.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).GoBack()
  53.     End Sub
  54.  
  55.     Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
  56.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).GoForward()
  57.     End Sub
  58.  
  59.     Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
  60.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).Refresh()
  61.     End Sub
  62.  
  63.     Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
  64.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).Stop()
  65.     End Sub
  66.  
  67.     Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
  68.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).GoHome()
  69.     End Sub
  70.  
  71.     Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
  72.         CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).Navigate(ComboBox1.Text)
  73.     End Sub
  74.  
  75.     Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
  76.         ToolStripStatusLabel1.Text = CType(TabControl1.SelectedTab.Controls.Item(0), WebBrowser).StatusText
  77.     End Sub
  78. End Class