 SUBJECT, DESCRIPTION, ID)
  The format of EVENTS is the same than using the function &lt;a href=&quot;matlab:help btkGetEvents&quot;&gt;btkGetEvents&lt;/a&gt;.

  This function can also returns an updated list of events' informations.
  [EVENTS, EVENTSINFO] = BTKAPPENDEVENT(H, LABEL, TIME, CONTEXT)
  [EVENTS, EVENTSINFO] = BTKAPPENDEVENT(H, LABEL, TIME, CONTEXT, SUBJECT)
  [EVENTS, EVENTSINFO] = BTKAPPENDEVENT(H, LABEL, TIME, CONTEXT, SUBJECT, DESCRIPTION)
  [EVENTS, EVENTSINFO] = BTKAPPENDEVENT(H, LABEL, 