53 lines
1.9 KiB
HTML
53 lines
1.9 KiB
HTML
<HTML>
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<HEAD><TITLE>QuickBASIC 3.0 - Long Entry</TITLE></HEAD>
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<A HREF="ng18b5e.html">[<<Previous Entry]</A>
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<A HREF="ng320.html">[^^Up^^]</A>
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<A HREF="info.html">[About The Guide]</A>
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<PRE>
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<B>LOCK Control File or Record Access</B>
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<B>LOCK</B> [#] <U>filenum</U> [,{<U>record</U> | [<U>start</U>] TO <U>end</U>}]
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.
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. [<U>statements</U>]
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.
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UNLOCK [#] <U>filenum</U> [,{<U>record</U> | [<U>start</U>] TO <U>end</U>}]
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Make a specified record range or an entire file inaccessible to other
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users.
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<U>filenum</U> The number under which the file was OPENed.
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<U>record</U> The number of a record to be LOCKed or UNLOCKed.
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<U>start</U> The number of the first record to be LOCKed or UNLOCKed.
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<U>end</U> The number of the last record to be LOCKed or UNLOCKed.
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-----------------------------------------------------------------------
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<B>Notes:</B> If the file specified by <U>filenum</U> has been opened for
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random access, you may lock either a single record number
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(with the record argument) or a range of record numbers.
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If you specify a range and omit the <U>start</U> argument, all
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records from the beginning of the file to end are locked.
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If the file specified by <U>filenum</U> was opened for sequential
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input or output, the entire file is locked.
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LOCK requires DOS 3.0 or later and SHARE.EXE.
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It is important to UNLOCK all LOCKed records before
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closing the file.
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</PRE>
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<HR>
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This page created by ng2html v1.05, the Norton guide to HTML conversion utility.
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Written by <A HREF="http://www.acemake.com/hagbard">Dave Pearson</A>
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