Instructions:

  Db Use              - opens a database
  Db Close            - closes an opened database
  Db Saved On         - sets the record state
  Db Saved Off        - sets the record state
  Db Select           - selects a given channel
  Db Select First     - select the first used channel
  Db Select Next      - select the first unused channel
  Db Goto             - record positioning
  Db Put              - puts data to a field
  Db Append           - add a new record
  Db Append Blank
  Db Swap             - swap two record
  Db Delete           - delete the current record
  Db Recall           - recall a deleted record
  Db Pack             - remove deleted records
  Db Zap              - remove all records
  Db Skip             - step to the next record
  Db Cutspace On/Off  - controls the empty spaces on the field
  Db Setdeleted On/Off- controls the acess of deleted records
  Db Notify           - flushes database and allow notification
  Db Locate           - searching record by record
  Db Continue         - search for the next occurence

Functions:

  =Db Flen()   - length of each field
  =Db Ftype()  - type of the date
  =Db Field$() - the name of the given field
  =Db Field()  - the number of the named field
  =Db Get()   - the contents of a field

System variables:

  Db Sel       - number of the work area
  Db Address   - address of the internal date zone
  Db Fieldno   - number of the fields
  Db Recsaved  - state of the record
  Db Opencount - return the number of used channels
  Db State     - used or unused, this is the question
  Db Reccount  - number of the records
  Db Recno     - number of the current record
  Db Recle     - record length
  Db Deleted
  Db Found     - result of the last Db Locate