I have a file that contains records that have a beginning date field and a ending date field.  My summary report is working, it is breaking as it should and contains subtotals and a grand total.  My problem is I want to report records that are between a user entered beginning date and ending date.  How do I get those dates and use them to run my subsummary report?

Create two new global fields UserStartDate and UserEndDate and place them on a  layout.  Create a script

If[not isEmpty(YourTable::UserStartDate) and not IsEmpty(YourTable::UserEndDate)]
Set Field[YourTable::EndDate; YourTable::UserEndDate]
Set Field[YourTable::StartDate; YourTable::UserStartDate]
Set Field[YourTable::UserStartDate; ""]
Set Field[YourTable::UserEndDate; ""]
Go To Layout["YourSummaryReportLayout"]
End if

Attach a script trigger OnObjectExit which calls this script to both the UserStartDate and UserEndDate fields on the layout.