If you need to return data based on a date range selected.  That's easy enought to put in... you just create a new Parameter field, set the type to "Date" and make sure the "Allow range vales" option is set to true.  With the parameter field created, you need to add a record selection formula that reads like this...

 

(TABLENAME.DATEFIELD) = {?DateRange Parameter)

 

...and all the records returned will be in that date range.

If you also need to display that range value in the report, which took a little digging to figure out.  All you need to do is to create a Formula field with the following code:

WhilePrintingRecords;

DateTimeVar date1;
DateTimeVar date2;

date1:=Minimum({?DateRange Parameter});
date2:=Maximum({?DateRange Parameter});

totext(Date(date1)) + " and " + totext(Date(date2))

 

 Then all you need to do is slap that formula field somewhere on the report, and it will display the date range selected in the parameter.

 

HTH

 

--Praveen G