Used to lock records or files.
| Argument | Input/Output | Value |
|---|---|---|
| CODE | Input | 5 |
| Output | unchanged | |
| BFS | Input | BFS List |
| Output | unchanged | |
| HANDLE | Input | File Handle |
| Output | unchanged | |
| NAME | Input | Record Key, if a record is being locked; NULL if a file is being locked |
| Output | unchanged | |
| FMC | Input | Lock Type |
| Output | unchanged | |
| RECORD | Input | null |
| Output | Lock semaphore | |
| STATUS | Input | unassigned |
| Output | TRUE$ if lock successful |
The MFS should not alter the semaphore returned in the RECORD argument. This information is used by the system to set lock information stored internally in the system.
BASIC+ LOCK statement