codice:
<%@ Page Language="VB" %>

<Script>
Sub BttSubmit(Obj as Object, E as Eventargs)
   Dim MyVar as String =TxtName.Text
   Response.Redirect("altra_pagina.aspx?nome=MyVar")
End Sub
</Script>

<html>
<head>
<title>Aprova #2</title>
</head>
<body bgcolor="#FFFFFF">
<form runat="server">
    Inserisci il tuo nome : 
    <asp:TextBox id="txtName" runat="server" />
    <asp:button id="Submit" text="INVIO"  runat="server" OnClick="BttSubmit" />
</form>
</body>
</html>