This type of subroutine corresponds to the "conventional" subroutine call, in that a parameter list is passed to the subroutine from the calling routine, and a number of parameters and/or a return code is returned at the end of the subroutine's execution. Within an object-oriented application, such subroutines should be used to perform processing that is limited in scope to a single application object (such as an SQL query on a database owned by the application object), or to perform a standard processing function that is common to a number of objects, but where the scope of each execution instance is limited to a single object. For example, a function DrawCircle may be called by a number of window procedures to display a circular graphics primitive; however, each invocation of the function is from a single window procedure.