private void checkedListBox2_MouseDown(object sender, MouseEventArgs e)
{
CheckedListBox check2 = sender as CheckedListBox;
index = check2.IndexFromPoint(e.X, e.Y);
if (index >= 0 & e.Button == MouseButtons.Left)
{
check2.DoDragDrop(check2.Items[index].ToString(), DragDropEffects.Move);
}
}