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  OrdFor():

  Syntax:   OrdFor( <cOrderName> | <nOrder> [, <cIndexFile>] )

       cOrderName = The name of the Order (or tag) to be created.

       nOrder = An integer that identifies the position in the Order List
                of the target Order whose cForExp is sought.

       cIndexFile = The name of the index file containing one or more Orders.
                    You may specify <cIndexFile> as the filename with or
                    without the path name or extension.  If you do not inc-
                    lude the extension as part of <cIndexFile>, the default
                    extension of the currently active RDD is assumed.

  Returns:

     A character expression representing the FOR condition of the specified
     Order.  If the Order was not created using the FOR clause the return
     value will be an empty string ("").  If the database driver does not
     support the FOR condition, it may either return an empty string ("")
     or raise an "unsupported function" error, depending on the driver.

  Description:

     OrdFor() is an Order management function that returns the character
     string representing the logical FOR condition of the Order, <cOrderName>
     or <nOrder>.

  Example:

     USE test VIA "SIXNSX"
     INDEX ON test->LAST TO LAST FOR test->AGE > 35
     ? OrdFor( "LAST" )      // Returns: "test->AGE > 35"