Name

Lock Procedure — Microsoft.VisualBasic.FileSystem

Synopsis

Lock(filenumber[, record])               Syntax 1.
Lock(filenumber[, fromrecord,torecord]   Syntax 2.
filenumber required; Integer

Any valid file number

record optional; Long

The record or byte number at which to commence the lock

fromrecord optional; Long

The first record or byte number to lock

torecord optional; Long

The last record or byte number to lock

Description

The Lock procedure prevents another process from accessing a record, section, or whole file until it is unlocked by the Unlock function.

Use the Lock procedure in situations where multiple programs or more than one instance of your program may need read and write access to the same data file.

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