This callback iteratively processes lists of users. 
Syntax:
FSV-C-add-to-user-list using      number-of-entries
                                  fsvw-data-block
Parameters:
| number-of-entries | pic xx comp-x. | 
| fsvw-data-block | A group item defined as: | 
| fsvw-insert-list-box-item ( i ) | occurs 10. | 
 
See the topic FSVIEW Datablock for a complete definition of fsvw-data-block. 
On Entry:
| number-of-entries | The number of entries | 
| fsvw-insert-list-box-item ( i ) | The user information for a specific user | 
 
Comments:
RETURN-CODE must be set to 0 before returning.