Use a querydef recordset to return the result and store it in a form textbox, esp.
Dim db As DAO.Database
Dim rs As DAO.Recordset
Dim qdf As QueryDef
Dim sSQL As String
Set db = CurrentDb
sSQL = "your sql string which returns one record"
Set qdf = db.CreateQueryDef("", sSQL)
Set rs = qdf.OpenRecordset(dbOpenSnapshot)
'no error check has be shown for no records being returned because of back criteria or just no result
rs.movefirst
Forms!yourForm!txtBox = rs.fields(i) 'where i=0 to N-1 fields to pickup the field your want
rs.close
db.close
set rs=nothing
set db=nothing