What you say is only partially true. When you use Autopostback, there's a
postback not only when you press Enter in the testbox, but also onblur such
as when you tab out of the textbox. Try the following code with autopostback
true and then false and ttab in and out of the textbox. You'll see the
difference.
<%@ Page Language="VB" %>
<script runat="server">
sub page_load
if ispostback then
label1.text=now.tolongtimestring()
end if
end sub
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<p>
<asp:Label id="Label1" runat="server">Label</asp:Label>
</p>
<p>
<asp:TextBox id="TextBox1" runat="server"
AutoPostBack="True"></asp:TextBox>
</p>
<!-- Insert content here -->
</form>
</body>
</html>
