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 Get the logical record number of the current record

     ORDKEYNO([<cOrder> | <nPosition>],
        [<cIndexFile>]) --> nKeyNo


     <cOrder> | <nPosition> is the name of the order or a number
     representing its position in the order list.  Using the order name is
     the preferred method since the position may be difficult to determine
     using multiple-order index files.  If omitted or NIL, the controlling
     order is assumed.

     Specifying an invalid order will raise a runtime error.

     <cIndexFile> is the name of an index file, including an optional
     drive and directory (no extension should be specified).  Use this
     argument with <cOrder> to remove ambiguity when there are two or more
     orders with the same name in different index files.

     If <cIndexFile> is not open by the current process, a runtime error is


     ORDKEYNO() returns the relative position of the current record in the
     specified order as a numeric value.  ORDKEYNO() respects the scope and
     for condition of the order by returning zero if the record pointer is
     positioned on an invalid record or if EOF() is true (.T.).


     ORDKEYNO() returns the logical record number of a key in an order.  This
     is in contrast to the physical record number (returned using the RECNO()
     function), which is the relative position of the record in the physical
     database file.

     Tip:  This function can be useful for displaying scroll bars and
     messages, such as "Record 9 of 123," when viewing records in a browser.

     By default, this function operates on the currently selected work area.
     It will operate on an unselected work area if you specify it as part of
     an aliased expression.


     .  This example shows the difference between physical and logical
        record number:

        USE Customer            // Assuming 1000 records
        SET INDEX TO First      // Make records in first order

        GO TOP                  // Position the data pointer at
                                // the first record

        ? ORDKEYNO()            // Result: 1

        ? ORDKEYNO()            // Result: 11
        ? RECNO()               // Result: Physical record number

        ? ORDKEYNO()            // Result: 1000
        ? RECNO()               // Result: Physical record number

 Files   Library is CLIPPER.LIB.

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