var
  Device : array[0..cchDeviceName-1] of Char;
  Driver : array[0..(MAX_PATH-1)] of Char;
  Port : array[0..32] of Char;
  hDMode : THandle;
  pDMode : PDevMode;
  sDev : array[0..32] of Char;
begin
  Printer.GetPrinter(Device,Driver,Port,hDMode);
  if hDMode <> 0 then
  begin
    pDMode :=GlobalLock(hDMode);
    if pDMode <> nil then
    begin
      pdMode^.dmOrientation :=2;
      // landscape
      pdMode^.dmPaperSize := DMPAPER_A3
      // (см. win32.hlp DEVMODE)
      GlobalUnlock(hDMode);
    end;
  end;
end;