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   ISUNIQUE()

       Purpose

   Determine status of SET UNIQUE ON/OFF command.

       Parameters

   None.

       Return Value

   .T. if SET UNIQUE ON, otherwise .F.

       Comments

   Use ISUNIQUE() in a UDF to query Clipper's unique setting, change 
   it if necessary, and then restore the original value.

       Example

   .
   .
   .
   set unique on
   ? ISUNIQUE()              && prints .T.
   .
   .
   .

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