Guardian Procedure Calls Reference Manual

is the length (in bytes) of the key used for comparing generic mode and exact-positioning mode
that is used to decide when to stop returning these records. The value must be no longer than
the key-value-len value. If omitted or 0, the value used is the smaller value of
key-value-len or keylength of the key specified by the keyspecifier parameter.
Returned Value
INT
A file-system error code that indicates the status of the operation.
Considerations
The considerations for the KEYPOSITION[X] Procedures (Superseded by FILE_SETKEY_ Procedure)
(page 750) apply to the FILE_SETKEY_ procedure.
508 Guardian Procedure Calls (F)