ADO has seven objects:
Connection: Connect the data source,
Command: Send SQL commands,
Parameter: The parameters of the filled SQL command,
Recordset: Data positioning and operation, is the concept of a user view,
Field: Reflecting the RECORDSET's object column, is a collection of Recordset columns.
Error: Error Collection,
Property: The properties of the object.
ADO4 collection:
ERRORS: All error objects created for a single connection error.
Parameters: All Parameter objects associated with the Command object.
Fields: The field object set for the Recordset object.
Properties: The property set related to Connection, Command, Recordset, Field object.
ADO event handler, and some events.
