Error en OpenDialog

[[eduarcol]]

debes agregar sysutils al uses

Código Delphi [-]

procedure TForm1.BitBtn1Click(Sender: TObject);
var
   i,j,indice: integer;
  Str: String;
begin
  if OpenDialog1.Execute then
    Edit1.Text:=OpenDialog1.FileName;
    Edit2.Text:=('>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>');
    Edit2.Text:=('Load File..................OK !');
  Memo1.Clear;
  //Inicializo las columnas y filas de el stringgrid donde se inicia la escritura
  with TStringList.Create do
    try
      if FileExists(Edit1.Text) then
      begin
         LoadFromFile(Edit1.Text);
         FillChar(Buffer,Sizeof(Buffer),#255);
         for i:= 0 to Count - 1 do
           Insertar(Strings[i],Buffer);
           j:= StrToInt(Label2.caption);
           Str:= EmptyStr;
      end;