Windows Forms

Request.Cookies.Add(...);   // add cookie
Request.Cookies[id]...   // access cookie

using System.Web;

public static class SessionHelper
{
	public static string SomeString
	{
		get { return HttpContext.Current.Session["SomeString"] as string; }
		set { HttpContext.Current.Session["SomeString"] = value; }
	}

	public static int SomeNumber
	{
		get { return (int)HttpContext.Current.Session["SomeNumber"]; }
		set { HttpContext.Current.Session["SomeNumber"] = value; }
	}

}

private void button1_Click(object sender, EventArgs e)
{
	WindowsApplication1.Form1 frm = new WindowsApplication1.Form1();
	frm.Show();
}

Private Sub button1_Click(sender as object, e as EventArgs) handles button1.click
	frm as new WindowsApplication1.Form1
	frm.Show()
End Sub