UltraLite Static C++ User's Guide
C++ API Reference
Generated table class
enum{ index-name,... }
Each member of the enumeration is an index name in the table being generated. You can use the index name to specify an ordering for the table when it is opened, and thereby control the behavior of the cursor movement methods.
index-name The name of an index in the table. The primary key has the name Primary, and other indexes have their name in the database.