You could:
1. Make a table with a date/time field, a notes field (text or memo) and,
possibly, a cancellation field to hold your reminders. A form to fill then
in would be a good idea.
2. Use a form that is already open anyway, or use a dummy, always open but
hidden one if a permanent one is not available, to run a timer event with an
interval of, say, 5 mins. The timer event should check the table above for
records where date/time is greater than current date and time (and possibly
less than current date and time + 5 mins), to show the notes by means of a
form. You could add functionality to push notes back (i.e. change the
date/time field in the table), set the cancellation field so it no longer
comes up if the 5 min window is not utilised etc.
All of this is greatly implemented by MS-Outlook Calendar (this is where I
drew my suggestions from). If you don't have it or insist to implement it in
Access (re-invent the wheel, that is...), you might at least take a look at
it, it will give you a good picture of basic functionality to implement.
HTH,
Nikos
