Listing 9

handle_event on_size(l_param_lo width, l_param_hi height) {
    // ...
    return event<WM_SIZE>().HANDLED_BY(&me::on_size);
}
handle_event on_rclick(l_param<NMHDR> hdr) {
    // ...
    return notify<IDTEXT,NM_RCLICK>().HANDLED_BY(&me::on_rclick);
}
handle_event on_timer(w_param<> event_id) {
    // ...
    return event<WM_TIMER>().HANDLED_BY(&me::on_timer);
}
handle_event on_hscroll(w_param_lo scroll_type, w_param_hi pos) {
    // ...
    return event<WM_HSCROLL>().HANDLED_BY(&me::on_hscroll);
}