Changing Table Source In Query Using Vb Instead Of Manually Doing It.

I have a Query called Median and all it does is pulls all the fields and all the records from 1 table. Since the Query is connected to a lot of other queries, and the table it's connected to changes twice a month, I was wondering if there was a way to set this up in a form maybe using vb, so a user could maybe Click a new table from a combo box list of current tables in the database, then click a button that says "Change", and it change all the fields to the new table and removes the old table from the query.

Or what might be better is: Already on the form, i have part of the name of the new table already entered by the user (it bases the new name of the new table off this text box). So, what I can use is the Text in that box and an & " the rest of the tablename", and automatically change the table in the Median Query based on that criteria. If that is too complicated, then a combo box will be sufficient.

Another way i guess, would be to setup a hidden field that takes whatever's in my text box (which is a date) and adds " the rest of the tablename", then I could base the replacement table of the Median on that one text box.

Anyway, is there a way to do this?