Returns the connection string for the specified mail merge data source. Read-only String.
Example
This example creates a new main document and attaches the Customers table from a Microsoft Access database named "Northwind.mdb." The connection string is displayed in a message box.
Dim docNew As Document
Set docNew = Documents.Add
With docNew.MailMerge
.MainDocumentType = wdFormLetters
.OpenDataSource _
Name:="C:\Program Files\Microsoft Office\Office" & _
"\Samples\Northwind.mdb", _
LinkToSource:=True, AddToRecentFiles:=False, _
Connection:="TABLE Customers"
MsgBox .DataSource.ConnectString
End With