How to set sqlserver stored procedure as data source for a datawindow

I am using powerbuilder 11.2 and  database sqlserver ,  Please can u let me know  how to call stored procedure  as resultset for datawindow .

for example

Select

Customercode,sum(balance)

from sales

Where Customercode in(:asCustomer)

group by CustomerCode

Please advise  me how to bring each customer balance into the datawindow using stored procedure.

With Kind regards and Thanks

Polachan