ADO对象模型的概要

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ADO对象模型的概要
下图是ADO模型中的对象示意图，白色的是Collection。

ADO Object Summary

Object	Description
Command	Defines a specific command that you intend to execute against a data source.
Connection	Represents an open connection to a data source.
DataControl (RDS)	Binds a data query Recordset to one or more controls (for example, a text box, grid control, or combo box) to display the Recordset data on a Web page.
DataFactory (RDS Server)	Implements methods that provide read/write data access to specified data sources for client-side applications.
DataSpace (RDS)	Creates client-side proxies to custom business objects located on the middle tier.
Error	Contains details about data access errors that pertain to a single operation involving the provider.
Field	Represents a column of data with a common data type.
Parameter	Represents a parameter or argument associated with a Command object based on a parameterized query or stored procedure.
Property	Represents a dynamic characteristic of an ADO object that is defined by the provider.
Record	Represents a row of a Recordset, or a directory or file in a file system.
Recordset	Represents the entire set of records from a base table or the results of an executed command. At any time, the Recordset object refers to only a single record within the set as the current record.
Stream	Represents a binary stream of data.

ADO Collection Summary

Collection	Description
Errors	Contains all the Error objects created in response to a single provider-related failure.
Fields	Contains all the Field objects of a Recordset object.
Parameters	Contains all the Parameter objects of a Command object.
Properties	Contains all the Property objects for a specific instance of an object.

ADO Property Summary

Property	Description
AbsolutePage	Indicates on which page the current record resides.
AbsolutePosition	Indicates the ordinal position of a Recordset object's current record.
ActiveCommand	Indicates the Command object that created the associated Recordset object.
ActiveConnection	Indicates to which Connection object the specified Command, Recordset, or Record object currently belongs.
ActualSize	Indicates the actual length of a field's value.
Attributes	Indicates one or more characteristics of an object.
BOF and EOF	BOF — indicates that the current record position is before the first record in a Recordset object. EOF — indicates that the current record position is after the last record in a Recordset object.
Bookmark	Indicates a bookmark that uniquely identifies the current record in a Recordset object or sets the current record in a Recordset object to the record identified by a valid bookmark.
CacheSize	Indicates the number of records from a Recordset object that are cached locally in memory.
CharSet	Indicates the character set into which the contents of a text Stream should be translated.
CommandText	Indicates the text of a command to be issued against a provider.
CommandTimeout	Indicates how long to wait while executing a command before terminating the attempt and generating an error.
CommandType	Indicates the type of a Command object.
Connect (RDS)	Indicates the database name from which the query and update operations are run.
ConnectionString Property	Indicates the information used to establish a connection to a data source.
ConnectionTimeout	Indicates how long to wait while establishing a connection before terminating the attempt and generating an error.
Count	Indicates the number of objects in a collection.
CursorLocation	Indicates the location of the cursor service.
CursorType	Indicates the type of cursor used in a Recordset object.
DataMember	Indicates the name of the data member that will be retrieved from the object referenced by the DataSource property.
DataSource	Indicates an object that contains data to be represented as a Recordset object.
DefaultDatabase	Indicates the default database for a Connection object.
DefinedSize	Indicates the data capacity of a Field object.
Description	Describes an Error object.
Direction	Indicates whether the Parameter represents an input parameter, an output parameter, or both, or if the parameter is the return value from a stored procedure.
EditMode	Indicates the editing status of the current record.
EOS	Indicates whether the current position is at the end of the stream.
ExecuteOptions (RDS)	Indicates whether asynchronous execution is enabled.
FetchOptions (RDS)	Indicates the type of asynchronous fetching.
Filter	Indicates a filter for data in a Recordset.
FilterColumn (RDS)	Indicates the column on which to evaluate the filter criteria.
FilterCriterion (RDS)	Indicates the evaluation operator to use in the filter value.
FilterValue (RDS)	Indicates the value to filter records.
Handler (RDS)	Indicates the name of a server-side customization program (handler) that extends the functionality of the RDSServer.DataFactory, and any parameters used by the handler.
HelpContext and HelpFile	Indicates the help file and topic associated with an Error object. HelpContextID — returns a context ID, as a Long value, for a topic in a Help file. HelpFile — returns a String value that evaluates to a fully resolved path to a Help file.
Index	Indicates the name of the index currently in effect for a Recordset object.
InternetTimeout (RDS)	Indicates the number of milliseconds to wait before a request times out.
IsolationLevel	Indicates the level of isolation for a Connection object.
Item	Indicates a specific member of a collection, by name or ordinal number.
LineSeparator	Indicates the binary character to be used as the line separator in text Stream objects.
LockType	Indicates the type of locks placed on records during editing.
MarshalOptions	Indicates which records are to be marshaled back to the server.
MaxRecords	Indicates the maximum number of records to return to a Recordset from a query.
Mode	Indicates the available permissions for modifying data in a Connection, Record, or Stream object.
Name	Indicates the name of an object.
NativeError	Indicates the provider-specific error code for a given Error object.
Number	Indicates the number that uniquely identifies an Error object.
NumericScale	Indicates the scale of numeric values in a Parameter or Field object.
OriginalValue	Indicates the value of a Field that existed in the record before any changes were made.
PageCount	Indicates how many pages of data the Recordset object contains.
PageSize	Indicates how many records constitute one page in the Recordset.
ParentURL	Indicates an absolute URL string that points to the parent Record of the current Record object.
Position	Indicates the current position within a Stream object.
Precision	Indicates the degree of precision for numeric values in a Parameter object or for numeric Field objects.
Prepared	Indicates whether to save a compiled version of a command before execution.
Provider	Indicates the name of the provider for a Connection object.
ReadyState (RDS)	Indicates the progress of a DataControl object as it fetches data into its Recordset object.
RecordCount	Indicates the number of records in a Recordset object.
Recordset and SourceRecordset (RDS)	Indicates the Recordset object returned from a custom business object.
RecordType	Indicates the type of Record object.
Server (RDS)	Indicates the Internet Information Services (IIS) name and communication protocol.
Size	Indicates the maximum size, in bytes or characters, of a Parameter object.
Size (ADO Stream)	Indicates the total size of the stream in number of bytes.
Sort	Indicates one or more field names on which the Recordset is sorted, and whether each field is sorted in ascending or descending order.
SortColumn (RDS)	Indicates by which column to sort the records.
SortDirection (RDS)	Indicates whether a sort order is ascending or descending.
Source (ADO Error)	Indicates the name of the object or application that originally generated an error.
Source (ADO Record)	Indicates the entity represented by the Record object.
Source (ADO Recordset)	Indicates the source for the data in a Recordset object
SQL (RDS)	Indicates the query string used to retrieve the Recordset.
SQLState	Indicates the SQL state for a given Error object.
State	Indicates for all applicable objects whether the state of the object is open or closed. Indicates for all applicable objects executing an asynchronous method, whether the current state of the object is connecting, executing, or retrieving
Status (ADO Field)	Indicates the status of a Field object.
Status (ADO Recordset)	Indicates the status of the current record with respect to batch updates or other bulk operations.
StayInSync	Indicates, in a hierarchical Recordset object, whether the reference to the underlying child records (that is, the chapter) changes when the parent row position changes.
Type	Indicates the operational type or data type of a Parameter, Field, or Property object.
Type (ADO Stream)	Indicates the type of data contained in the Stream (binary or text).
UnderlyingValue	Indicates a Field object's current value in the database.
URL (RDS)	Indicates a string that contains a relative or absolute URL.
Value	Indicates the value assigned to a Field, Parameter, or Property object.
Version	Indicates the ADO version number.

ADO Dynamic Property Summary
Dynamic properties can be added to the Properties collections of the Connection, Command, or Recordset objects. The source for these properties is either a data provider, such as the OLE DB Provider for SQL Server, or a service provider, such as the Microsoft Cursor Service for OLE DB. Refer to the appropriate data provider or service provider documentation for more information about a specific dynamic property.
The ADO Dynamic Property Index provides a cross-reference between the ADO and OLE DB names for each standard OLE DB provider dynamic property.
The following dynamic properties are of special interest, and are also documented in the sources mentioned above. Special functionality with ADO is documented in the ADO help topics listed below.

Property	Description
Optimize	Specifies whether an index should be created on this field.
Prompt	Specifies whether the OLE DB provider should prompt the user for initialization information.
Reshape Name	Specifies a name for the Recordset object.
Resync Command	Specifies a user-supplied command string that the Resync method issues to refresh the data in the table named in the Unique Table dynamic property.
Unique Table, Unique Schema, Unique Catalog	Unique Table — specifies the name of the base table upon which updates, insertions, and deletions are allowed. Unique Schema — specifies the schema, or name of the owner of the table. Unique Catalog — specifies the catalog, or name of the database containing the table.
Update Resync	Specifies whether the UpdateBatch method is followed by an implicit Resync method operation, and if so, the scope of that operation.

ADO Method Summary

Method	Description
AddNew	Creates a new record for an updatable Recordset object.
Append	Appends an object to a collection. If the collection is Fields, a new Field object may be created before it is appended to the collection.
AppendChunk	Appends data to a large text or binary data Field, or to a Parameter object.
BeginTrans, CommitTrans, and RollbackTrans	Manages transaction processing within a Connection object as follows: BeginTrans — Begins a new transaction. CommitTrans — Saves any changes and ends the current transaction. It may also start a new transaction. RollbackTrans — Cancels any changes and ends the current transaction. It may also start a new transaction.
Cancel (ADO)	Cancels execution of a pending, asynchronous method call.
Cancel (RDS)	Cancels execution of a pending, asynchronous method call.
CancelBatch	Cancels a pending batch update.
CancelUpdate (ADO)	Cancels any changes made to the current or new row of a Recordset object, or the Fields collection of a Record object, before calling the Update method.
CancelUpdate (RDS)	Cancels any changes made to the current or new row of a Recordset object.
Clear	Removes all the Error objects from the Errors collection.
Clone	Creates a duplicate Recordset object from an existing Recordset object. Optionally, specifies that the clone be read-only.
Close	Closes an open object and any dependent objects.
CompareBookmarks	Compares two bookmarks and returns an indication of their relative values.
ConvertToString (RDS)	Converts a Recordset to a MIME string that represents the recordset data.
CopyRecord	Copies a file or directory, and its contents, to another location.
CopyTo	Copies the specified number of characters or bytes (depending on Type) in the Stream to another Stream object.
CreateObject (RDS)	Creates the proxy for the target business object and returns a pointer to it.
CreateParameter	Creates a new Parameter object with the specified properties.
CreateRecordset (RDS)	Creates an empty, disconnected Recordset.
Delete (ADO Parameters Collection)	Deletes an object from the Parameters collection.
Delete (ADO Fields Collection)	Deletes an object from the Fields collection.
Delete (ADO Recordset)	Deletes the current record or a group of records.
DeleteRecord	Deletes a file or directory, and all its subdirectories.
Execute (ADO Command)	Executes the query, SQL statement, or stored procedure specified in the CommandText property.
Execute (ADO Connection)	Executes the specified query, SQL statement, stored procedure, or provider-specific text.
Find	Searches a Recordset for the row that satisfies the specified criteria.
Flush	Forces the contents of the Stream remaining in the ADO buffer to the underlying object with which the Stream is associated.
GetChildren	Returns a Recordset whose rows represent the files and subdirectories in the directory represented by this Record.
GetChunk	Returns all, or a portion of, the contents of a large text or binary data Field object.
GetRows	Retrieves multiple records of a Recordset object into an array.
GetString	Returns the Recordset as a string.
LoadFromFile	Loads the contents of an existing file into a Stream.
Move	Moves the position of the current record in a Recordset object.
MoveFirst, MoveLast, MoveNext, and MovePrevious (ADO)	Moves to the first, last, next, or previous record in a specified Recordset object and makes that record the current record.
MoveFirst, MoveLast, MoveNext, MovePrevious (RDS)	Moves to the first, last, next, or previous record in a specified Recordset object.
MoveRecord	Moves a file, or a directory and its contents, to another location.
NextRecordset	Clears the current Recordset object and returns the next Recordset by advancing through a series of commands.
Open (ADO Connection)	Opens a connection to a data source.
Open (ADO Record)	Opens an existing Record object, or creates a new file or directory.
Open (ADO Recordset)	Opens a cursor.
Open (ADO Stream)	Opens a Stream object to manipulate streams of binary or text data.
OpenSchema	Obtains database schema information from the provider.
Query (RDS)	Uses a valid SQL query string to return a Recordset.
Read	Reads a specified number of bytes from a Stream object.
ReadText	Reads a specified number of characters from a text Stream object.
Refresh (ADO)	Updates the objects in a collection to reflect objects available from, and specific to, the provider.
Refresh (RDS)	Requeries the data source specified in the Connect property and updates the query results.
Requery	Updates the data in a Recordset object by re-executing the query on which the object is based.
Reset (RDS)	Executes the sort or filter on a client-side Recordset, based on the specified sort and filter properties.
Resync	Refreshes the data in the current Recordset object, or Fields collection of a Record object, from the underlying database.
Save	Saves the Recordset in a file or Stream object.
SaveToFile	Saves the binary contents of a Stream to a file.
Seek	Searches the index of a Recordset to quickly locate the row that matches the specified values, and changes the current row position to that row.
SetEOS	Sets the position that is the end of the stream.
SkipLine	Skips one entire line when reading a text stream.
SubmitChanges (RDS)	Submits pending changes of the locally cached and updatable Recordset to the data source specified in the Connect property.
Supports	Determines whether a specified Recordset object supports a particular type of functionality.
Update	Saves any changes you make to the current row of a Recordset object, or the Fields collection of a Record object.
UpdateBatch	Writes all pending batch updates to disk.
Write	Writes binary data to a Stream object.
WriteText	Writes a specified text string to a Stream object.

ADO Event Summary

Event	Description
BeginTransComplete	Called after the BeginTrans operation.
CommitTransComplete	Called after the CommitTrans operation.
ConnectComplete	Called after a connection starts.
Disconnect	Called after a connection ends.
EndOfRecordset	Called when there is an attempt to move to a row past the end of the Recordset.
ExecuteComplete	Called after a command has finished executing.
FetchComplete	Called after all the records in a lengthy asynchronous operation have been retrieved into the Recordset.
FetchProgress	Called periodically during a lengthy asynchronous operation to report how many rows have currently been retrieved into the Recordset.
FieldChangeComplete	Called after the value of one or more Field objects has changed.
InfoMessage	Called whenever a warning occurs during a ConnectionEvent operation.
MoveComplete	Called after the current position in the Recordset changes.
onError (RDS)	Called whenever an error occurs during an operation.
onReadyStateChange (RDS)	Called whenever the value of the ReadyState property changes.
RecordChangeComplete	Called after one or more records change.
RecordsetChangeComplete	Called after the Recordset has changed.
RollbackTransComplete	Called after the RollbackTrans operation.
WillChangeField	Called before a pending operation changes the value of one or more Field objects in the Recordset.
WillChangeRecord	Called before one or more records (rows) in the Recordset change.
WillChangeRecordset	Called before a pending operation changes the Recordset.
WillConnect	Called before a connection starts.
WillExecute	Called just before a pending command executes on this connection and affords the user an opportunity to examine and modify the pending execution parameters.
WillMove	The WillMove event is called before a pending operation changes the current position in the Recordset.

ADO Enumerated Constant Summary

Enumeration	Description
ADCPROP_ASYNCTHREADPRIORITY_ENUM	For an RDS Recordset object, specifies the execution priority of the asynchronous thread that retrieves data.
ADCPROP_AUTORECALC_ENUM	Specifies when the MSDataShape provider re-calculates aggregate and calculated columns in a hierarchical Recordset.
ADCPROP_UPDATECRITERIA_ENUM	Specifies which fields can be used to detect conflicts during an optimistic update of a row of the data source with a Recordset object.
ADCPROP_UPDATERESYNC_ENUM	Specifies whether the UpdateBatch method is followed by an implicit Resync method operation and if so, the scope of that operation.
AffectEnum	Specifies which records are affected by an operation.
BookmarkEnum	Specifies a bookmark indicating where the operation should begin.
CommandTypeEnum	Specifies how a command argument should be interpreted.
CompareEnum	Specifies the relative position of two records represented by their bookmarks.
ConnectModeEnum	Specifies the available permissions for modifying data in a Connection, opening a Record, or specifying values for the Mode property of the Record and Stream objects.
ConnectOptionEnum	Specifies whether the Open method of a Connection object should return after (synchronously) or before (asynchronously) the connection is established.
ConnectPromptEnum	Specifies whether a dialog box should be displayed to prompt for missing parameters when opening a connection to an ODBC data source.
CopyRecordOptionsEnum	Specifies the behavior of the CopyRecord method.
CursorLocationEnum	Specifies the location of the cursor engine.
CursorOptionEnum	Specifies what functionality the Supports method should test for.
CursorTypeEnum	Specifies the type of cursor used in a Recordset object.
DataTypeEnum	Specifies the data type of a Field, Parameter, or Property.
EditModeEnum	Specifies the editing status of a record.
ErrorValueEnum	Specifies the type of ADO run-time error.
EventReasonEnum	Specifies the reason that caused an event to occur.
EventStatusEnum	Specifies the current status of the execution of an event.
ExecuteOptionEnum	Specifies how a provider should execute a command.
FieldEnum	Specifies the special fields referenced in a Record object's Fields collection.
FieldAttributeEnum	Specifies one or more attributes of a Field object.
FilterGroupEnum	Specifies the group of records to be filtered from a Recordset.
GetRowsOptionEnum	Specifies how many records to retrieve from a Recordset.
IsolationLevelEnum	Specifies the level of transaction isolation for a Connection object.
LineSeparatorsEnum	Specifies the character used as a line separator in text Stream objects.
LockTypeEnum	Specifies the type of lock placed on records during editing.
MarshalOptionsEnum	Specifies which records should be returned to the server.
MoveRecordOptionsEnum	Specifies the behavior of the Record object MoveRecord method.
ObjectStateEnum	Specifies whether an object is open or closed, connecting to a data source, executing a command, or fetching data.
ParameterAttributesEnum	Specifies the attributes of a Parameter object.
ParameterDirectionEnum	Specifies whether the Parameter represents an input parameter, an output parameter, or both, or if the parameter is the return value from a stored procedure.
PersistFormatEnum	Specifies the format in which to save a Recordset.
PositionEnum	Specifies the current position of the record pointer within a Recordset.
PropertyAttributesEnum	Specifies the attributes of a Property object.
RecordCreateOptionsEnum	Specifies for the Record object Open method whether an existing Record should be opened, or a new Record should be created.
RecordOpenOptionsEnum	Specifies options for opening a Record. These values may be combined by using an OR operator.
RecordStatusEnum	Specifies the status of a record with regard to batch updates and other bulk operations.
RecordTypeEnum	Specifies the type of Record object.
ResyncEnum	Specifies whether underlying values are overwritten by a call to Resync.
SaveOptionsEnum	Specifies whether a file should be created or overwritten when saving from a Stream object. The values can be combined with an AND operator.
SchemaEnum	Specifies the type of schema Recordset that the OpenSchema method retrieves.
SearchDirectionEnum	Specifies the direction of a record search within a Recordset.
SeekEnum	Specifies the type of Seek to execute.
StreamOpenOptionsEnum	Specifies options for opening a Stream object. The values can be combined with an AND operator.
StreamReadEnum	Specifies whether the whole stream or the next line should be read from a Stream object.
StreamTypeEnum	Specifies the type of data stored in a Stream object.
StreamWriteEnum	Specifies whether a line separator is appended to the string written to a Stream object.
StringFormatEnum	Specifies the format when retrieving a Recordset as a string.
XactAttributeEnum	Specifies the transaction attributes of a Connection object.

ADO Error Code List
ErrorValueEnum
Specifies the type of ADO run-time error.
Three forms of the error number are listed:

Positive decimal—the low two bytes of the full number in decimal format. This number is displayed in the default Visual Basic error message dialog box. For example, Run-time error '3707'.

Negative decimal—The decimal translation of the full error number.

Hexadecimal—The hexadecimal representation of the full error number. The Windows facility code is in the fourth digit. The facility code for ADO error numbers is A. For example: 0x800A0E7B.

Note OLE DB errors may be passed to your ADO application. Typically, these can be identified by a Windows facility code of 4. For example, 0x8004.... For more information about these numbers, see Chapter 16 of the OLE DB Programmer's Reference.

Constant	Value	Description
adErrBoundToCommand	3707 -2146824581 0x800A0E7B	Cannot change the ActiveConnection property of a Recordset object which has a Command object as its source.
adErrCannotComplete	3732 -2146824556 0x800A0E94	Server cannot complete the operation.
adErrCantChangeConnection	3748 -2146824540 0x800A0EA4	Connection was denied. New connection you requested has different characteristics than the one already in use.
adErrCantChangeProvider	3220 -2146825068 0X800A0C94	Supplied provider is different from the one already in use.
adErrCantConvertvalue	3724 -2146824564 0x800A0E8C	Data value cannot be converted for reasons other than sign mismatch or data overflow. For example, conversion would have truncated data.
adErrCantCreate	3725 -2146824563 0x800A0E8D	Data value cannot be set or retrieved because the field data type was unknown, or the provider had insufficient resources to perform the operation.
adErrCatalogNotSet	3747 -2146824541 0x800A0EA3	Operation requires a valid ParentCatalog.
adErrColumnNotOnThisRow	3726 -2146824562 0x800A0E8E	Record does not contain this field.
adErrDataConversion	3421 -2146824867 0x800A0D5D	Application uses a value of the wrong type for the current operation.
adErrDataOverflow	3721 -2146824567 0x800A0E89	Data value is too large to be represented by the field data type.
adErrDelResOutOfScope	3738 -2146824550 0x800A0E9A	URL of the object to be deleted is outside the scope of the current record.
adErrDenyNotSupported	3750 -2146824538 0x800A0EA6	Provider does not support sharing restrictions.
adErrDenyTypeNotSupported	3751 -2146824537 0x800A0EA7	Provider does not support the requested kind of sharing restriction.
adErrFeatureNotAvailable	3251 -2146825037 0x800A0CB3	Object or provider is not capable of performing requested operation.
adErrFieldsUpdateFailed	3749 -2146824539 0x800A0EA5	Fields update failed. For further information, examine the Status property of individual field objects.
adErrIllegalOperation	3219 -2146825069 0x800A0C93	Operation is not allowed in this context.
adErrIntegrityViolation	3719 -2146824569 0x800A0E87	Data value conflicts with the integrity constraints of the field.
adErrInTransaction	3246 -2146825042 0x800A0CAE	Connection object cannot be explicitly closed while in a transaction.
adErrInvalidArgument	3001 -2146825287 0x800A0BB9	Arguments are of the wrong type, are out of acceptable range, or are in conflict with one another.
adErrInvalidConnection	3709 -2146824579 0x800A0E7D	Operation is not allowed on an object referencing a closed or invalid connection.
adErrInvalidParamInfo	3708 -2146824580 0x800A0E7C	Parameter object is improperly defined. Inconsistent or incomplete information was provided.
adErrInvalidTransaction	3714 -2146824574 0x800A0E82	Coordinating transaction is invalid or has not started.
adErrInvalidURL	3729 -2146824559 0x800A0E91	URL contains invalid characters. Make sure the URL is typed correctly.
adErrItemNotFound	3265 -2146825023 0x800A0CC1	Item cannot be found in the collection corresponding to the requested name or ordinal.
adErrNoCurrentRecord	3021 -2146825267 0x800A0BCD	Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record.
adErrNotExecuting	3715 -2146824573 0x800A0E83	Operation cannot be performed while not executing.
adErrNotReentrant	3710 -2146824578 0x800A0E7E	Operation cannot be performed while processing event.
adErrObjectClosed	3704 -2146824584 0x800A0E78	Operation is not allowed when the object is closed.
adErrObjectInCollection	3367 -2146824921 0x800A0D27	Object is already in collection. Cannot append.
adErrObjectNotSet	3420 -2146824868 0x800A0D5C	Object is no longer valid.
adErrObjectOpen	3705 -2146824583 0x800A0E79	Operation is not allowed when the object is open.
adErrOpeningFile	3002 -2146825286 0x800A0BBA	File could not be opened.
adErrOperationCancelled	3712 -2146824576 0x800A0E80	Operation has been cancelled by the user.
adErrOutOfSpace	3734 -2146824554 0x800A0E96	Operation cannot be performed. Provider cannot obtain enough storage space.
adErrPermissionDenied	3720 -2146824568 0x800A0E88	Insufficent permission prevents writing to the field.
adErrPropConflicting	3742 -2146824546 0x800A0E9E	Property value conflicts with a related property.
adErrPropInvalidColumn	3739 -2146824549 0x800A0E9B	Property cannot apply to the specified field.
adErrPropInvalidOption	3740 -2146824548 0x800A0E9C	Property attribute is invalid.
adErrPropInvalidValue	3741 -2146824547 0x800A0E9D	Property value is invalid. Make sure the value is typed correctly.
adErrPropNotAllSettable	3743 -2146824545 0x800A0E9F	Property is read-only or cannot be set.
adErrPropNotSet	3744 -2146824544 0x800A0EA0	Optional property value was not set.
adErrPropNotSettable	3745 -2146824543 0x800A0EA1	Read-only property value was not set.
adErrPropNotSupported	3746 -2146824542 0x800A0EA2	Provider does not support the property.
adErrProviderFailed	3000 -2146825288 0x800A0BB8	Provider failed to perform the requested operation.
adErrProviderNotFound	3706 -2146824582 0x800A0E7A	Provider cannot be found. It may not be properly installed.
adErrReadFile	3003 -2146825285 0x800A0BBB	File could not be read.
adErrResourceExists	3731 -2146824557 0x800A0E93	Copy operation cannot be performed. Object named by destination URL already exists. Specify adCopyOverwrite to replace the object.
adErrResourceLocked	3730 -2146824558 0x800A0E92	Object represented by the specified URL is locked by one or more other processes. Wait until the process has finished and attempt the operation again.
adErrResourceOutOfScope	3735 -2146824553 0x800A0E97	Source or destination URL is outside the scope of the current record.
adErrSchemaViolation	3722 -2146824566 0x800A0E8A	Data value conflicts with the data type or constraints of the field.
adErrSignMismatch	3723 -2146824565 0x800A0E8B	Conversion failed because the data value was signed and the field data type used by the provider was unsigned.
adErrStillConnecting	3713 -2146824575 0x800A0E81	Operation cannot be performed while connecting aynchronously.
adErrStillExecuting	3711 -2146824577 0x800A0E7F	Operation cannot be performed while executing asynchronously.
adErrTreePermissionDenied	3728 -2146824560 0x800A0E90	Permissions are insufficient to access tree or subtree.
adErrUnavailable	3736 -2146824552 0x800A0E98	Operation failed to complete and the status is unavailable. The field may be unavailable or the operation was not attempted.
adErrUnsafeOperation	3716 -2146824572 0x800A0E84	Safety settings on this computer prohibit accessing a data source on another domain.
adErrURLDoesNotExist	3727 -2146824561 0x800A0E8F	Either the source URL or the parent of the destination URL does not exist.
adErrURLNamedRowDoesNotExist	3737 -2146824551 0x800A0E99	Record named by this URL does not exist.
adErrVolumeNotFound	3733 -2146824555 0x800A0E95	Provider cannot locate the storage device indicated by the URL. Make sure the URL is typed correctly.
adErrWriteFile	3004 -2146825284 0x800A0BBC	Write to file failed.
adWrnSecurityDialog	3717 -2146824571 0x800A0E85	For internal use only. Don't use.
adWrnSecurityDialogHeader	3718 -2146824570 0x800A0E86	For internal use only. Don't use.