excel

procedure TForm1.Button1Click(Sender: TObject);
var Excel: Variant;
begin
Excel:=CreateOleObject('Excel.Application');
try
Excel.workbooks.open(FileName:=OpenDialog1.FileName, ReadOnly:=true);
Excel.Visible:=true;
except
ShowMessage('Ошибка!');
end;
end;
 
для отключения от Excel
 
Excel.close;
Excel.quit;
Excel := unassigned;

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ComObj, StdCtrls, OleServer, ExcelXP;
 
type
  TForm1 = class(TForm)
    ExcelApplication1: TExcelApplication;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    OpenDialog1: TOpenDialog;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
  Ap : Variant;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.Button1Click(Sender: TObject);
begin
  Ap := CreateOleObject('Excel.Application');
  Ap.Visible := True;
end;
 
procedure TForm1.Button2Click(Sender: TObject);
begin
  Ap.Workbooks.Add;
end;
 
procedure TForm1.Button3Click(Sender: TObject);
//var Ap: Variant;
begin
  //Ap:=CreateOleObject('Excel.Application');
  try
    Ap.workbooks.open(FileName:=OpenDialog1.FileName, ReadOnly:=true);
    Ap.Visible:=true;
  except
    ShowMessage('Ошибка!');
end;
 
end;
 
end.

procedure TForm1.Button1Click(Sender: TObject);
var Excel: Variant;
OD:TOpenDialog;
begin
OD:=TOpenDialog.Create(Self);
if TOpenDialog(OD).Execute then 
 begin
Excel:=CreateOleObject('Excel.Application');
try
Excel.workbooks.open(FileName:=OpenDialog1.FileName, ReadOnly:=true);
Excel.Visible:=true;
except
ShowMessage('Ошибка!');
end;
end;
OD.Free;
end;