(x_update_begin):

(x_update_begin):
(x_update_end):
(x_clear_frame):
(x_ins_del_lines):
(x_change_line_highlight):
(x_delete_glyphs):
(w32_ring_bell):
(x_update_begin):
(x_update_end):
(w32_reassert_line_highlight):
(w32_frame_rehighlight):
(w32_frame_raise_lower): Do nothing if not w32 frame.