I have a form with 3 command buttons, labeled "This Month", "Last Month" and
"This Year".  It's the "pre-form" to another form that has a date field in
it.

The onclick property for each button opens the very same form, but I'd like
the query for the form to catch the dates for this month, or last month, or
this year respectively.

I have the queries developed and working, but it seems I should be able to
use one form, rather than use 3 basically identical forms that vary only in
the underlying query.

How?