private void btnlogout_Click_3(object sender, EventArgs e)
        {
            phome.Visible = false;
            lblmsg.Text   = "";
            Microsoft.Win32.Registry.CurrentUser.DeleteSubKey("MyRegKey");
            lblchanges.Text = "";
            Addmain admin = new Addmain();

            this.Close();
        }
 private void loginToolStripMenuItem_Click(object sender, EventArgs e)
 {
     try
     {
         Addmain ad = new Addmain();
         ad.MdiParent = this;
         ad.Show();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }