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INDEXKEY()


Syntax:     INDEXKEY(<expN>)

Purpose:    To determine the key expression of a specified index.

Argument:   <expN> is the ordinal position of the index in the list
            of index files opened by the last USE...INDEX or SET INDEX
            TO command for the current work area.  A zero value
            specifies the controlling index, without regard to its
            actual position in the list.

Returns:    A character string.

            INDEXKEY() returns the key expression of the specified
            index.  If there is no index for the position the function
            argument points to, INDEXKEY() returns a null string ("").

Library:    CLIPPER.LIB


----------------------------------- Examples -------------------------------

   USE Customers INDEX Name, Serial
   SET ORDER TO 2
   ? INDEXKEY(1)              && Result: Name index exp
   ? INDEXKEY(2)              && Result: Serial index exp
   ? INDEXKEY(0)              && Result: Serial index exp