The TAdsDictionary component has been deprecated. The majority of the functionality this component provides can be retrieved in an easier fashion through the use of the system tables (system.dictionary, system.tables, etc.) and canned stored procedures (sp_ModifyDatabase, sp_ModifyTableProperty, etc).
Unit
AdsDictionary
Description
Use TAdsDictionary to gain administrative access to an Advantage Data Dictionary. You have the ability to add and delete tables, set table, and record level constraints, construct Referential Integrity, create views, and get all available information about the data dictionary.
Delphi 6 and greater If using the default login dialog, you must add the DBLogDlg (or QDBLogDlg if using CLX) unit to the uses clause of the unit that declares the connection component. See the Delphi "Controlling Server Login" documentation for more details.