/// <summary>
        /// Pressing the F3 and searching again inside rich text box
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void findAgain(object sender, EventArgs e)
        {
            if (searchBox == null || searchBox.IsDisposed)
            {
                searchBox = new SearchBox();

                searchBox.Show();
            }

            if (tabPageHindi.ContainsFocus)
            {
                searchBox.rtb = this.richTextBoxHindi;
            }
            else
            {
                searchBox.rtb = this.richTextBoxNepali;
            }


            searchBox.FindText(sender, e);
            //this.Hide();
            //searchBox.Show();
        }