Unlocks portions of a shared file for access by other network programs.
UNLOCK [#]file_number [,{record |
[start ] TO end}] |
file_number is the file number assigned to the file in its OPEN statement.
record is an integer value that specifies a single record to release in a random-access file or a single byte to unlock in a binary file.
start and end are integer values that specify the range of record numbers to release in a random-access file or the range of bytes to unlock in a binary file.
UNLOCK is necessary only in network environments.
OPEN "SHARED.DAT" FOR RANDOM AS #1
LOCK #1, 1 TO 10
'Perform file update operations
UNLOCK #1, 1 TO 10
CLOSE #1