private void btnAdd_Click(object sender, EventArgs e)
        {
            SearchFile SF;

            SF = new SearchFile(KeyWord);
            SF.Show();
            SF.FormClosed += new FormClosedEventHandler(SF_FormClosed);
        }
        void SF_FormClosed(object sender, FormClosedEventArgs e)
        {
            SearchFile SF = (SearchFile)sender;

            if (SF.Selected != null)
            {
                lstObjects.Items.Add(SF.Selected);
            }
        }