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
Dim tRows As Integer
Const Pwd As String = "" 'Insert password (if any) here

With CCtrl
  'Check that the Content Control is within our table.
  If .Range.InRange(ActiveDocument.Tables(1).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
    '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
  
' Go to first cell in new row and change the number listed.
    Selection.EndKey Unit:=wdColumn
    Selection.StartOf Unit:=wdRow
    tRows = Selection.Information(wdMaximumNumberOfRows)
    tRows = tRows - 8
    Selection.Delete
    Selection.TypeText tRows
    
  ' Re-protect the document, if applicable
  .Protect Type:=Prot, Password:=Pwd
End With
End Sub