怎么读取别的软件上的控件？

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

public partial class reg : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string user = TextBox1.Text.Replace("'","");
        string pw = TextBox2.Text.Replace("'","");
        string email = TextBox4.Text.Replace("'","");
        DataBase db=new DataBase ();
       bool b= db.adlData("insert into tUser(cUser,cPW,cEmail) values('"+ user +"','"+ pw +"','"+ email +"')");
       if (b == true)
       {
           Response.Write("<script tpye='javascript'>alert('恭喜你注册成功');window.location.href='login.aspx';</script>");
       }
       else
       {
           Response.Write("<script tpye='javascript'>alert('用户名被占用');</script>");

       }
    }
}