TextBox2.aspx font size:
<head>
<title>Responding to Changes in a TextBox Web Control</title>
<link rel="stylesheet" href="/shared/netdemos.css">

<script language="C#" runat="server">
void setLabelText ( object src, EventArgs e ) {
   msg.Text = myTextBox.Text;
}
</script>
</head>

<body>
<!-- #include virtual="~/shared/top.inc -->
<div class="header"><h2>Responding to Changes in a TextBox Web Control</h2></div>

<!-- #include virtual="~/shared/viewsrc_top.inc" -->
<hr size=1 width=92%>

<div align="center">
<form runat="server">

   <p><asp:textbox id="myTextBox" width="200px" runat="server"
      onTextChanged="setLabelText" autopostback />

   <p><b><asp:label id="msg" runat="server"
      text="Type some text into the box and press Enter." /></b>

</form>
</div>

<hr size=1 width=92%>
<!-- #include virtual="~/shared/viewsrc.inc" -->

</body>
</html>