typedef struct an_erase_db {
    unsigned short      version;
    const char *        dbname;
    MSG_CALLBACK        confirmrtn;
    MSG_CALLBACK        errorrtn;
    MSG_CALLBACK        msgrtn;
    a_bit_field         quiet : 1;
    a_bit_field         erase : 1;
    const char *        encryption_key;
} an_erase_db;