ARCed.Scintilla.IncrementalSearcher.txtFind_TextChanged C# (CSharp) Method

        private void txtFind_TextChanged(object sender, EventArgs e)
        {
            txtFind.BackColor = SystemColors.Window;
            if (txtFind.Text == string.Empty)
                return;
            if (Scintilla == null)
                return;

            int pos = Math.Min(Scintilla.Caret.Position, Scintilla.Caret.Anchor);
            Range r = Scintilla.FindReplace.Find(pos, Scintilla.TextLength, txtFind.Text, Scintilla.FindReplace.Window.GetSearchFlags());
            if (r == null)
                r = Scintilla.FindReplace.Find(0, pos, txtFind.Text, Scintilla.FindReplace.Window.GetSearchFlags());

            if (r != null)
                r.Select();
            else
                txtFind.BackColor = Color.Tomato;

            moveFormAwayFromSelection();
        }