Opens or switches to the mail merge data source.
expression.EditDataSource
expression Required. An expression that returns a MailMerge object.
Remarks
If the data source is a Word document, this method opens the data source (or activates the data source if it's already open).
If Word is accessing the data through dynamic data exchange (DDE)
Security Dynamic data exchange (DDE) is an older technology that is not secure. If possible, use a more secure alternative to DDE, such as object linking and embedding (OLE).
If Word is accessing the data through open database connectivity (ODBC), this method displays the data in a Word document. Note that if Microsoft Query is installed, a message appears, providing the option to display Microsoft Query instead of converting data.
Example
This example opens or activates the data source attached to the document named "Sales.doc."
Documents("Sales.doc").MailMerge.EditDataSource
This example opens or activates the attached data source if the data source is a Word document.
Dim dsMain As MailMergeDataSource
Set dsMain = ActiveDocument.MailMerge.DataSource
If dsMain.Type = wdMergeInfoFromWord Then
ActiveDocument.MailMerge.EditDataSource
End If