public void Tb_TextChanged(object sender, EventArgs e)
{
//if (mItems == null)
// return;
//sItems = new List<int>();
//for (int i = 0; i < mItems.Count; i++)
//{
// //foreach (string a in mItems) {
// if (mItems[i].Contains(tb.Text))
// {
// sItems.Add(i);
// }
// //if tb.Text in a { }
//}
//lv.VirtualListSize = sItems.Count;
//throw new NotImplementedException();
sItems = Bits.getTextMatches(txt, tb.Text, mItems);
lv.VirtualListSize = sItems.Count;
}