There are various ways of doing this.  For one, see the article "Access a
database and insert into a Word document the data that you find there" at:

http://www.word.mvps.org/FAQs/InterDev/GetDataFromDB.htm

The following procedure in the Initialize event of a UserForm in Word can be
used to load a list box on that form with the records from a table in Access
so that the user can select the record that they want and then have the data
from that record inserted into the document that is created when a new
document is created based on the template in which the userform is located.

Private Sub UserForm_Initialize()
   Dim db As DAO.Database
   Dim rs As DAO.Recordset
   Dim NoOfRecords As Long
   ' Open the database
   Set db = OpenDatabase("D:\Access\ResidencesXP.mdb")
   ' Retrieve the recordset
   Set rs = db.OpenRecordset("SELECT * FROM Owners")
   ' Determine the number of retrieved records
   With rs
        .MoveLast
        NoOfRecords = .RecordCount
        .MoveFirst
   End With
   ' Set the number of Columns = number of Fields in recordset
   ListBox1.ColumnCount = rs.Fields.Count
   ' Load the ListBox with the retrieved records
   ListBox1.Column = rs.GetRows(NoOfRecords)
   ' Cleanup
   rs.Close
   db.Close
   Set rs = Nothing
   Set db = Nothing
End Sub