Public Sub AddRow()
'The following code conditionally adds a new row, with content controls, to the designated table.
Dim i As Long, j As Long, Prot As Long
Dim oTable As Table
Dim CCtrl As ContentControl
Const Pwd As String = ""    'Insert password (if any) here

    Set oTable = ActiveDocument.Tables(1)

    '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 oTable.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
        .Protect Type:=Prot, Password:=Pwd
    End With
    Set oTable = Nothing
    Exit Sub
End Sub