Word: Table frames ?

Hello,

How is this Line (from a word macro) written in delphi?

  Word.Selection.Borders(wdBorderRight).LineStyle = wdLineStyleNone

I tried those lines, but they won't work

//   Word.Selection.Borders[wdBorderTop].LineStyle := wdLineStyleNone;
//   Word.Selection.Borders.LineStyle := wdLineStyleNone;
//   Word.Selection.Borders(wdBorderBottom).LineStyle :=
wdLineStyleNone;

Thanks for any hint,
Pirmin