Output ASP tables to Excel and creat seperate worksheets

I have an ASP web page that creates 3 tables from a SQL data base.  I am abel to export the tables to Excel using the following code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Response.Clear()
        Response.Buffer = True
        Response.ContentType = "application/vnd.ms-excel"

        Response.Charset = ""

        Dim oStringWriter As System.IO.StringWriter = New System.IO.StringWriter
        Dim oHtmlTextWriter As System.Web.UI.HtmlTextWriter = New System.Web.UI.HtmlTextWriter(oStringWriter)

        tb2.RenderControl(oHtmlTextWriter)
        lbl1.RenderControl(oHtmlTextWriter)
        tb3.RenderControl(oHtmlTextWriter)
        lbl2.RenderControl(oHtmlTextWriter)
        tb4.RenderControl(oHtmlTextWriter)
        lbl3.RenderControl(oHtmlTextWriter)
        tb5.RenderControl(oHtmlTextWriter)
        Response.Write(oStringWriter.ToString())

        Response.End()

    End Sub


Each table is seperated by a label and all three tables are on one worksheet.

I would like to creat a seperate worksheet in the Excel workbook for each table. How can this be done?

Thanks.

Ira