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Opens or switches to the mail merge data source.
Assembly: Microsoft.Office.Interop.Word (in Microsoft.Office.Interop.Word.dll)
If the data source is a Microsoft 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)— using an application such as Microsoft Excel or Microsoft Access— this method displays the data source in that application.
Dynamic data exchange (DDE) is an older technology that is not secure. If possible, use a more secure alternative to DDE.
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.