Temporarily hilites a region in the buffer without changing the current
selection. See End of Line Ambiguity (section 
) for a discussion of the
ateol parameter. If scroll is TRUE, the buffer view will
be scrolled if necessary to show the hilited region. If timeout
is greater than 0, then the hiliting will be automatically turned off
after the given number of milliseconds.
See also wxMediaEdit::FlashOff (section ).