index_name is the name of the index.table_name is the name of the table on which the index is to be created.ASC tells Btrieve to create the index in ascending order. DESC tells Btrieve to create the index in descending order. By default, indexes are created in ascending order. For example:table_name is the name of the table from which the index is to be dropped.index_name is the name of the index.