private void FindSwitch(bool status)
{
// reset the search input text
if (status && !filtervisible) tbFilter.Text = "";
// show the "search" form
tlLeft.RowStyles[1].Height = status ? 25 : 0;
filtervisible = status;
// focus the filter input
tbFilter.Focus();
// pressed ctrl + F twice, select the search input text so we can search again over last one
if (status && filtervisible && tbFilter.Text != "") tbFilter.SelectAll();
}