retrieve value of hidden fields

Hi all, may i know how can i retrieve value of hidden fields from page1.aspx in page2.aspx
My button in page1.aspx
Protected Sub btn_submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btn_submit.Click

    Me.HiddenField1.Value = "Testing"
    Response.Redirect("page2.aspx")

End Sub
...