Delphi TRichEdit page setup

Question

I have an RTF document with defined page settings:

(...}\paperw16840\paperh11907\margl794\margt709\margr794\margb983\viewkind4\\uc1\trowd\....)

In my app I use a TRichEdit to show the document.

The TRichEdit has a TPanel as its Parent, and is using Align=alClient and AlignWithMargins=True.

I set the Panel's Width to 16840 * PixelsPerInch/1440 (1123 pixels) and I see that is equal to the page's width, as shown in MSWord (scale=100%).

Setting the RichEdit's Margins to 794 * PixelsPerInch/1440 (53 pixels), the Width of the RichEdit is smaller than it must be, or the margins are bigger than they must be (compared with MSWord).

No borders, no other margins, except what I set in code:

function pixelsOf(prop : string) : integer;
var
  i,j,l : integer;
begin
  result := -1;
  l := length(prop);
  i := pos(prop,s);
  if i > 0 then begin
    j := i+l;
    while s[j] in ['0'..'9'] do inc(j);
    result := round(strToIntDef(copy(s,i+l,j-i-l),-1)*PixelsPerInch/1440);
  end;
end;

paperW := pixelsOf('\paperw'); // pixelsOf() calcs twips*pixelsPerInch/1440
PanelPreview.Width := paperW; 
Lm := pixelsOf('\margl'); 
RichEdit1.Margins.Left := Lm; 
Rm := pixelsOf('\margr'); 
RichEdit1.Margins.Right := Rm; 
Tm := pixelsOf('\margt');   
RichEdit1.Margins.Top := Tm;

The value of paperW gives the correct Panel width (compared with MSWord), but the values of Lm and Rm give bigger margins, so the RichEdit becomes narrower.

How can I calculate the correct margins so the RichEdit has the same layout as MSWord?

This maybe helps. I noticed that :

1. TRichedit leaves a space about 10 pixels at the left side (the rendering is starting after this space). Is there a parameter that can be fix this other than margins.left ?
2. TRicheditdoesn't render any table wider than its width (MSword do this adjusting the margins). So the TRichedit trancates everything outside its margins.

The result of the above is that the left margin seems wider than must be and truncates the right side of the table if it is winder.

see the image