[AccessD] How do I change the default month in Leban's MonthCalendar module?

Hi Folks

I have attempted to use Leban's "MonthControl" solution
(http://www.lebans.com/monthcalendar.htm) for populating a date field on a
form. Of course, it works wonderfully - as programmed.

However, for the purposes of my specific form, the user will almost always
be entering data from the previous month. If I double-click on my
IncidentDate field today, the popup shows July, August and September - but
they will probably need June. 

Does anyone know where/how I can insert the DateAdd("mm",-1,Date) code to
have the it default to June, July and August (last month, this month and
next month)? I tried to work with the dtStart value, but my code keeps
failing ... 

TIA,
Bob Gajewski