new webpage in same window

[SAMARM]

Good day
I am writing code to open every page in internet explorer and every page will be in new tab but my code open every page in separate window
could plz help me :)
I am using c#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;

using System.Windows.Forms;

namespace RequestURLWeb
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            String url = textBox1.Text;
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            HttpWebResponse respo = (HttpWebResponse)req.GetResponse();

            System.Diagnostics.Process proc = new System.Diagnostics.Process();
            proc.StartInfo.FileName = "iexplore";
           
            proc.StartInfo.Arguments = url;
            proc.Start();
            System.Diagnostics.Process();
            
        



        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {

        }
    }
}

[Rabbit]

That's because you're creating a new process each time. Instead you should create an internet explorer object and use the API for it.