Private Sub Document_ContentControlOnExit(ByVal CCtrl As ContentControl, Cancel As Boolean)
'The following code conditionally adds a new row, with content controls, to the designated table.
Dim i As Long, j As Long, Prot As Variant
Const Pwd As String = "" 'Insert password (if any) here
'Bookmarking the table provides the flexibility of being able to deal with the addition/deletion
' of other tables before the one we want to process.
Const StrBkMk As String = "TblBkMk"
With ActiveDocument
  If .Bookmarks.Exists(StrBkMk) = False Then
    MsgBox "The table bookmark: '" & StrBkMk & "' is missing." & vbCr & _
    "Please add it to the relevant table before continuing.", vbExclamation
    Exit Sub
  End If
End With
With CCtrl
  'Check that the Content Control is within our bookmarked range.
  ' One could test for a particular table instead
  If .Range.InRange(ActiveDocument.Bookmarks(StrBkMk).Range) = False Then Exit Sub
  'Get the number of ContentControls in the table
  i = .Range.Tables(1).Range.ContentControls.Count
  'Get our ContentControl's index # in the table
  j = ActiveDocument.Range(.Range.Tables(1).Range.Start, .Range.End).ContentControls.Count
  'Check that we're using the last content control
  If i <> j Then Exit Sub
End With
'Solicit user input
If MsgBox("Add new row?", vbQuestion + vbYesNo) <> vbYes Then Exit Sub
With ActiveDocument
  ' Un-protect the document, if applicable
  Prot = .ProtectionType
  If .ProtectionType <> wdNoProtection Then
    Prot = .ProtectionType
    .Unprotect Password:=Pwd
  End If
  With Selection.Tables(1).Rows
    'Insert an empty paragraph after our table, then replace it with a replica of the last row
    With .Last.Range
      .Next.InsertBefore vbCr
      .Next.FormattedText = .FormattedText
    End With
    Selection.Tables(1).Range.Bookmarks.Add (StrBkMk)
    'Reset all content controls in the new last row
    For Each CCtrl In .Last.Range.ContentControls
      With CCtrl
        If .Type = wdContentControlCheckBox Then .Checked = False
        If .Type = wdContentControlRichText Or .Type = wdContentControlText Then .Range.Text = ""
        If .Type = wdContentControlDropdownList Then .DropdownListEntries(1).Select
        If .Type = wdContentControlComboBox Then .DropdownListEntries(1).Select
        If .Type = wdContentControlDate Then .Range.Text = ""
      End With
    Next
  End With
  ' Re-protect the document, if applicable
  .Protect Type:=Prot, Password:=Pwd
End With
End Sub

'Bookmarking the table provides the flexibility of being able to deal with the addition/deletion
' of other tables before the one we want to process.
Const StrBkMk As String = "TblBkMk"
With ActiveDocument
  If .Bookmarks.Exists(StrBkMk) = False Then
    MsgBox "The table bookmark: '" & StrBkMk & "' is missing." & vbCr & _
    "Please add it to the relevant table before continuing.", vbExclamation
    Exit Sub
  End If
End With

  'Check that the Content Control is within our bookmarked range.
  ' One could test for a particular table instead
  If .Range.InRange(ActiveDocument.Bookmarks(StrBkMk).Range) = False Then Exit Sub

  'Check that the Content Control is within our table.
  If .Range.InRange(ActiveDocument.Tables(#).Range) = False Then Exit Sub

  'Check that the Content Control is within our bookmarked range.
  ' One could test for a particular table instead
  If .Range.InRange(ActiveDocument.Bookmarks(StrBkMk).Range) = False Then Exit Sub