Sub ScratchMacro()
'A basic Word macro coded by Greg Maxey
Dim oCP As DocumentProperty
  With ActiveDocument
    On Error Resume Next
    Set oCP = .CustomDocumentProperties("Office")
    If Not Err.Number = 0 Then
      Set oCP = .CustomDocumentProperties.Add(Name:="Office", LinkToContent:=False, Value:=InputBox("What is your Office location?", "Home Base"), Type:=msoPropertyTypeString)
    Else
      oCP.Value = InputBox("What is your Office location?", "Home Base")
    End If
    On Error GoTo 0
    Debug.Print oCP.Value
  End With
End Sub