__fastcall TDBISAMIndexDef(TDBISAMIndexDefs* Owner, const
      System::UnicodeString Name, const System::UnicodeString Fields,
      Data::Db::TIndexOptions Options, const System::UnicodeString
      DescFields, TIndexCompression Compression, bool NoKeyStats)

Use the New operator to create an instance of a TDBISAMIndexDef object using the constructor. However, you should never need to create an instance of the TDBISAMIndexDef object since one is automatically created when using the various methods of the TDBISAMIndexDefs object.