I think what Leehambly is trying to say is that when you are prompted for your dates you would include the next date. e.g. 01/01/01 to 02/01/01 would show all records between 01/01/01 00:00:00 and 02/01/01 00:00:00. A 24 hour period from midnight to midnight. You do not try to adjust your expression to include the +1.
If you really want to force a day ahead then use this exression to add + 1 day to the 'Enter Date To' parameter
Between [Enter Date From:] And DateAdd("d",1,[Enter Date To:])
Now you can type 01/01 to 01/01 and it still returns the whole period.
Hope it Helps,