FastColoredTextBoxNS.AutocompleteListView.tb_KeyDown C# (CSharp) Method

        private void tb_KeyDown(object sender, KeyEventArgs e)
        {
            var tb = sender as FastColoredTextBox;
            if (Menu.Visible)
                if (ProcessKey(e.KeyCode, e.Modifiers))
                    e.Handled = true;

            if (!Menu.Visible)
            {
                if (tb.HotkeysMapping.ContainsKey(e.KeyData) &&
                    tb.HotkeysMapping[e.KeyData] == FCTBAction.AutocompleteMenu)
                {
                    DoAutocomplete();
                    e.Handled = true;
                }
                else
                {
                    if (e.KeyCode == Keys.Escape && timer.Enabled)
                        timer.Stop();
                }
            }
        }