This example opens a channel to Word, opens the Word document Sales.doc, and then inserts the contents of cell A1 (on Sheet1) at the beginning of the document.
channelNumber = Application.DDEInitiate( _
app:="WinWord", _
topic:="C:\WINWORD\SALES.DOC")
Set rangeToPoke = Worksheets("Sheet1").Range("A1")
Application.DDEPoke channelNumber, "\StartOfDoc", rangeToPoke
Application.DDETerminate channelNumber