`TSQLQuery`
pl	ro	OnCalcFields
pl	ro	OnDeleteError
pl	ro	OnEditError
pl	ro	OnFilterRecord
pl	ro	OnNewRecord
pl	ro	OnPostError

`TCustomSQLQuery`

`TCustomBufDataset`
pl		OnUpdateError

`TDBDataset`

`TDataSet`
		OnCalcFields
		OnDeleteError
		OnEditError
		OnFilterRecord
		OnNewRecord
		OnPostError

`TComponent`

`TPersistent`

`TObject`