Microsoft KB Archive/101289: Difference between revisions

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The SYS(2007) function returns the checksum value of the character expression &lt;expC&gt;. The correct syntax is SYS(2007,&lt;expC&gt;). A checksum can be used to test the validity of data or to compare two character expressions.<br />
The SYS(2007) function returns the checksum value of the character expression &lt;expC&gt;. The correct syntax is SYS(2007,&lt;expC&gt;). A checksum can be used to test the validity of data or to compare two character expressions.<br />
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NOTE: Checksum is a &quot;byte-oriented CRC-16&quot; algorithm. The exact logic was last published in the February 1986 edition of &quot;Dr. Dobbs Journal.&quot;
NOTE: Checksum is a "byte-oriented CRC-16" algorithm. The exact logic was last published in the February 1986 edition of "Dr. Dobbs Journal."
Additional query words: FoxMac FoxDos FoxWin check sum
Additional query words: FoxMac FoxDos FoxWin check sum



Revision as of 08:20, 20 July 2020

SYS(2007) Algorithm for Checksum

ID: Q101289



The information in this article applies to:

  • Microsoft FoxPro for Windows, versions 2.5, 2.5a, 2.5b
  • Microsoft FoxPro for MS-DOS, versions 2.0, 2.5, 2.5a, 2.5b
  • Microsoft FoxPro for Macintosh, version 2.5b



The SYS(2007) function returns the checksum value of the character expression <expC>. The correct syntax is SYS(2007,<expC>). A checksum can be used to test the validity of data or to compare two character expressions.

NOTE: Checksum is a "byte-oriented CRC-16" algorithm. The exact logic was last published in the February 1986 edition of "Dr. Dobbs Journal." Additional query words: FoxMac FoxDos FoxWin check sum

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Last Reviewed: August 23, 1999
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