Saving data

Hi ,
I have a personal form on my site which i want to save the details of the people taking my survey.
This data has to be saved uniquely and needs to be transfered to a text file (Tab delimited).
Does anyone have an idea what is the best way to do this and how?
This is the ASP code for my form : 
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="PersonalInfo.aspx.vb" Inherits="PersonalInfo2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Form</title>
    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />
</head>
<body> ...