# IDataSource.Export()

Description:

The `Export` method exports a set of landmarks from a landmark database.

This is a synchronous method.

Syntax:

    result = so.IDataSource.Export(criteria);

Arguments:

- `criteria`:

  This is an object that specifies the set of landmarks to export and optionally the source database. For more information about the object properties and how to define them, see section Criteria for exporting landmarks.

Return value:

The `Export` method returns an object that contains an error code and an error message.

Table: Return value properties for Export
Property | Description | Value
--- | --- | ---
`result.ErrorCode` | This is a number that specifies a predefined error code. | See Service API error codes.
`result.ErrorMessage` | This is a text string that describes the error. | See Landmarks Service API error messages.

Remarks:

- If no landmark database is specified, `Export` is performed on the default database. If the default database does not exist, it is created and set active. The default database is `file://c:eposlm.ldb`.

- For more information about landmarks, landmark categories, and landmark databases, see the Landmarks Service overview page.

Example code:

For the complete source of a sample widget that demonstrates how to use this Service API, see the full example.