procedure TForm1.Button1Click(Sender: TObject);
const
 FieldTypes: array[0..16] of string[10] = ('Unknown', 'String', 'Smallint',
  'Integer', 'Word', 'Boolean', 'Float', 'Currency', 'BCD', 'Date', 'Time',
  'DateTime', 'Bytes', 'VarBytes', 'Blob', 'Memo', 'Graphic');
var
 i, nX, nY, nHeight, nWidth: Integer;
 rtxtMetric: TTextMetric;
 s: array[0..3] of string[10];
begin
 with Table1.FieldDefs, Printer do
  begin
  Update;
  PrinterIndex := -1;
  Title := 'Структура ' + Table1.TableName;
  BeginDoc;
  nX := 0;
  nY := 0;
  WinProcs.GetTextMetrics(Canvas.Handle, rtxtMetric);
  nHeight := rtxtMetric.tmHeight;
  nWidth := rtxtMetric.tmAveCharWidth;
  for i := 0 to Count - 1 do
  begin
  s[0] := IntToStr(Items[i].FieldNo) + #9;
  s[1] := Items[i].Name + #9;
  s[2] := FieldTypes[Ord(Items[i].DataType)] + #9;
  s[3] := IntToStr(Items[i].Size);
  Canvas.TextOut(nX, nY, s[0]);
  Inc(nX, Length(s[0]) * nWidth);
  Canvas.TextOut(nX, nY, s[1]);
  Inc(nX, Length(s[1]) * nWidth);
  Canvas.TextOut(nX, nY, s[2]);
  Inc(nX, Length(s[2]) * nWidth);
  Canvas.TextOut(nX, nY, s[3]);
  nX := 0;
  nY := i * nHeight;
  end;
  EndDoc;
  end;
end;