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 clearFilter()
 Clear the active filter expression
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 Prototype

     ERRCODE clearFilter(
                             AREAP wa
                           )

 Arguments

     wa is a pointer to self.

 Description

     clearFilter() clears the filter expression currently in use for a
     specified work area.

 Default Behavior

     clearFilter() removes the filter expression in wa->dbfi.  The items held
     in wa->dbfi.itmCobExpr and wa->dbfi.abFilterText are both released and
     set to NULL.

 Implementation Notes

     .  Verify that all items are properly released upon any
        reimplementation of clearFilter().

 Files  Header file is Rdd.api.