How to use dbms_sql_define_column when no of columns are not known in Advance

[Quoted]    Can any body tell me how to use the DBMS_SQL.DEFINE_COLUMN when the no of columns and its dat Types are not known before hand.I am passing the table name as a parameter and get the columns from COLS data dictionary.I tried using Varrays but could not solve my problem.

    Any help would be greatly Appreciated.

                              Bye       

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Madhu Shekar M.C
Robert Bosch India Ltd
Bangalore