You can't because you muse increase its value ONLY when you leave Customer Group

>Why the need for the _VFP.SetVar?? Can I use just a regular Report Variable?
>
>Thanks
>
>Brenda
>
>
>>>I have a weekly report that details the products ordered for each day. The data is sorted by date, customer, product number. There is a footer for customer and date. But in the date footer, I want a count of the number of unique customers for that day. How can I do this?
>>>
>>>thanks
>>>
>>>Brenda
>>
>>How is your data presented? This may be too complicated, but that's first what comes to my mind:
>>

>>local lnCustomers
>>lnCustomers = 0
>>REPORT FORM myReport ...
>>
>>
>>
>>OnEntry _VFP.SetVar('lnCustomers', 0)
>>Date - group header
>>  Customer group header
>>     Details
>>  Customer group footer
>>  onExit function _VFP.SetVar('lnCustomers', m.lnCustomers + 1)
>>Date group footer
>>