菜鸟求助！！！未定义类型“Notify”该怎么定义啊。。具体语句是什么吖。。。

Public Partial Class Admin_Information_Notice
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(sender As Object, e As EventArgs)
        If Not Page.IsPostBack Then
            BindNotifyData()
        End If
    End Sub
    Private Sub BindNotifyData()
        Dim notify As New Notify()
        Dim recc As SqlDataReader = notify.GetNotify()
        If recc.Read() Then
            Desn.Text = recc("Desn").ToString()
            Body.Text = recc("Body").ToString()
        End If
        recc.Close()
    End Sub
    Protected Sub SureBtn_Click(sender As Object, e As EventArgs)
        '''定义类
        Dim notify As New Notify()
        '''修改数据
        notify.UpdateNotify(Desn.Text, Body.Text)
        '''显示操作结果信息
        Response.Write("<script>window.alert('修改数据项成功。')</script>")
    End Sub
End Class