UltraLite User's Guide
The Embedded SQL Interface
Library function reference
void ULRevokeConnectFrom( SQLCA * sqlca, ul_char * userid );
Revoke access from an UltraLite database for a user ID.
sqlca A pointer to the SQLCA.
userid Character array holding the user ID to be excluded from database access. The maximum length is 16 characters.
User authentication for UltraLite databases
Adding user authentication to your application