When the column is set to not updatable (as shown below), modifying the column data and then performing an update will cause the rowsupdated argument of the UpdateEnd event to:
- 
                     Return 1 in PowerBuilder, but actually no update statement is generated at all. 
- 
                     Return 0 in PowerServer, indicating that no rows are updated. 
dw_control.Object.columnname.Update = "No"


