can someone fix my vb error???

Public Class spammer

    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged

    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
  SendKeys.Send(TextBox1.Text)
  SendKeys.Send("{Enter}")
  Timer1.Stop()
  Timer2.Start()
    End Sub

    Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
  SendKeys.Send(TextBox2.Text)
  SendKeys.Send("{Enter}")
  Timer2.Stop()
  Timer3.Start()
    End Sub

    Private Sub Timer3_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer3.Tick
  SendKeys.Send(TextBox3.Text)
  SendKeys.Send("{Enter}")
  Timer3.Stop()
  Timer1.Start()
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
  Timer1.Start()
  Timer1.Interval = TextBox4.Text
    End Sub

    Private Sub TextBox5_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox4.TextChanged

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
  Timer1.Stop()
  Timer2.Stop()
  Timer3.Stop()
    End Sub

    Private Declare Function GetAsynckeystate Lib "user32" (ByVal vkey As Long) As Integer
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
  Timer4.Start()
    End Sub
    Private Sub Timer4_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer4.Tick
  Dim hotkey1 As Boolean
  Dim hotkey2 As Boolean

  hotkey1 = GetAsynckeystate(Keys.A)
  hotkey2 = GetAsynckeystate(Keys.L)

  'spammer(start)
  If hotkey1 = True Then
    Timer1.Start()
    Timer2.Interval = TextBox4.Text
    Timer3.Interval = TextBox4.Text

  End If
  'spammer stop
  If hotkey2 = True Then
    Timer1.Stop()
    Timer2.Stop()
    Timer3.Stop()
  End If

    End Sub

End Class