例

<script language="VB" runat="server">

    Sub SubmitBtn_Click(sender As Object, e As EventArgs)
        Label1.Text = "Text1.Text = " & Text1.Text
    End Sub

</script>

<h3><font face="Verdana">TextBox Sample</font></h3>

<form runat="server">

  <asp:TextBox id="Text1" Text="Copy this text to the label" Width="200px" runat="server"/>

  <asp:Button OnClick="SubmitBtn_Click" Text="Copy Text to Label" Runat="server"/>

  <p>
  
  <asp:Label id="Label1" Text="Label1" runat="server"/>

</form>