Function SendString (StringVar$)

' The Wedge must be running and activated for COM1 for this code to work
chan = DDEInitiate("WinWedge", "Com1") ' initiate DDE channel with wedge
DDEExecute chan, "[SEND(" + StringVar$ + ")]" ' send String out the serial port
DDETerminate chan ' terminate the link

End Function

This code can even be used to send an entire table or query out the serial port:

Sub SendQuery()
Dim chan, MyDb, MyQuery, strSend

'set database
Set MyDb = CurrentDb()

'open a table or query that holds the data you wish to send
Set MyQuery = MyDb.OpenRecordset("Deliveries")

'Open DDE Channel to WinWedge
chan = DDEInitiate("WinWedge", "COM2")

'point to first record in the table/query
MyQuery.MoveFirst

Do
strSend = "" 'reset string between records

'Generate string to send
For i = 0 To MyQuery.Fields.Count - 1
strSend = strSend & MyQuery.Fields(i) & ","
Next

'trim off last comma and replace it with CR/LF
strSend = Left(strSend, Len(strSend) - 1) & vbCrLf

'send string
DDEExecute chan, "[SEND(" + strSend + ")]"

MyQuery.MoveNext 'point to next record in the query
Loop Until MyQuery.EOF 'while (we have not reached the end of the table/query)

quit:
'close DDE channel and clean up
DDETerminate chan
Set db = Nothing
Set chan = Nothing

End Sub

Collecting Data Directly To A Table In An Access Database
Launching And Terminating WinWedge From Access