combo box filtering

Hi
I am doing a final display page for my database. I t will be used for the
purpose of looking up already entered records.

What I have is 3 unbounded combo boxes that all independently filter a list
box to display certain records..
- these 3 combo boxes have command buttons to activate the filtering
I then have 2 text boxes(txtbegin and txtend), which uses its own query to
filter the field (Date Located ) in the record list box..

What I would like to do is have the Date box dependent on the other 3 combo
boxes. So you can have a date range and another combo filter, filtering the
final List display