델파이 초보자입니다. 실습해보다가 질문이 있어서요..

강좌에 있는  'OLE없이 엑셀파일 만들기' 소스를 실행해보니 에러가 떠요.
  

1. type에 어떤 컴포넌트가 들어가야 하는지 궁금합니다.
            DBGrid1: TDBGrid;
            Button1: TButton;
  
2. 아래 소스를 컴파일 하면
        CXlsBof[4] := BuildNumber;
    위의 부분에서
    [Error] Unit1.pas(35): Left side cannot be assigned to
    이런 에러가 뜹니다.

  
--------------------------------------------------------------------------

const
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);

var
  Form1: TForm1;

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 FStream: TFileStream;
   I, J: Integer;
begin
FStream := TFileStream.Create('c:e.xls', fmCreate);
try
   XlsBeginStream(FStream, 0);
   for I := 0 to 99 do
     for J := 0 to 99 do
     begin
       XlsWriteCellNumber(FStream, I, J, 34.34);
      // XlsWriteCellRk(FStream, I, J, 3434);
      // XlsWriteCellLabel(FStream, I, J, Format('Cell: %d,%d', [I, J]));
     end;
   XlsEndStream(FStream);
finally
   FStream.Free;
end;
end;