Autoajustar celdas excel

[leogobo]

hola, tengo el siguiente codigo para exportar a excel pero no se como autoajustar celdas:

Código Delphi [-]
unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  shellapi,
  Dialogs, StdCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Label1: TLabel;
    Label2: TLabel;
    Edit1: TEdit;
    Label3: TLabel;
    Edit2: TEdit;
    Label4: TLabel;
    Edit3: TEdit;
    Button2: TButton;
    RadioGroup1: TRadioGroup;

    procedure XlsBeginStream(XlsStream: TStream; const BuildNumber: Word);
    procedure XlsEndStream(XlsStream: TStream);
    procedure XlsWriteCellLabel(XlsStream: TStream; const ACol, ARow: Word;
      const AValue: string);
    procedure XlsWriteCellNumber(XlsStream: TStream; const ACol,
      ARow: Word; const AValue: Double);
    procedure XlsWriteCellRk(XlsStream: TStream; const ACol, ARow: Word;
      const AValue: Integer);

    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

  CXlsBof   : array[0..5] of Word = ($809, 8, 00, $10, 0, 0);
  CXlsEof   : array[0..1] of Word = ($0A, 00);
  CXlsLabel : array[0..5] of Word = ($204, 0, 0, 0, 0, 0);
  CXlsNumber: array[0..4] of Word = ($203, 14, 0, 0, 0);
  CXlsRk    : array[0..4] of Word = ($27E, 10, 0, 0, 0);


implementation

{$R *.dfm}

procedure XlsBeginStream(XlsStream: TStream; const BuildNumber: Word);
begin
//  CXlsBof[4] := BuildNumber;
  XlsStream.WriteBuffer(CXlsBof, SizeOf(CXlsBof));
end;

procedure XlsEndStream(XlsStream: TStream);
begin
  XlsStream.WriteBuffer(CXlsEof, SizeOf(CXlsEof));
end;


procedure XlsWriteCellRk(XlsStream: TStream;
                           const ACol, ARow: Word;
                           const AValue: Integer);
var
  V: Integer;
begin
  CXlsRk[2] := ARow;
  CXlsRk[3] := ACol;
  XlsStream.WriteBuffer(CXlsRk, SizeOf(CXlsRk));
  V := (AValue shl 2) or 2;
  XlsStream.WriteBuffer(V, 4);
end;

procedure XlsWriteCellNumber(XlsStream: TStream;
                             const ACol, ARow: Word;
                             const AValue: Double);
begin
  CXlsNumber[2] := ARow;
  CXlsNumber[3] := ACol;
  XlsStream.WriteBuffer(CXlsNumber, SizeOf(CXlsNumber));
  XlsStream.WriteBuffer(AValue, 8);
end;

procedure XlsWriteCellLabel(XlsStream: TStream;
                            const ACol, ARow: Word;
                            const AValue: string);
var
  L: Word;    
begin
  L := Length(AValue);
  CXlsLabel[1] := 8 + L;
  CXlsLabel[2] := ARow;
  CXlsLabel[3] := ACol;
  CXlsLabel[5] := L;
  XlsStream.WriteBuffer(CXlsLabel, SizeOf(CXlsLabel));
  XlsStream.WriteBuffer(Pointer(AValue)^, L);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  aa : string ;
  FStream: TFileStream;
  I, J: Integer;
begin

  aa := ExtractFilePath( Application.ExeName ) + trim ( Edit3.Text ) + '.xls' ;

  FStream := TFileStream.Create( aa, fmCreate);
//  FStream := TFileStream.Create('J:\e.xls', fmCreate);
  try

    XlsBeginStream(FStream, 0);

    for I := 1 to strtoint ( Edit2.Text ) do       // Columnas
      for J := 1 to strtoint ( Edit1.Text ) do     // Filas
      begin

        case RadioGroup1.ItemIndex of
          0: XlsWriteCellNumber(FStream, I, J, 34.34);
          1: XlsWriteCellRk(FStream, I, J, 3434);
          2: XlsWriteCellLabel(FStream, I, J, Format('Cell: %d,%d', [I, J]));
        else ;
        end;

      end;

    XlsEndStream(FStream);

  finally
    FStream.Free;
  end;

  ShellExecute(Handle,nil, PChar( aa ), '', '',SW_SHOWNORMAL) ;

end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  close ;
end;

end.

No se si alguno me podria ayudar para poder autoajustar las celdas.

Muchas Gracias