如何改变一个BITMAP/JPEG图片的整个幅面尺寸大小?

Question

procedure TForm1.Button1Click(Sender: TObject);
begin
  Image1.Width := Image1.Width + 10;
  Image1.Highe := Image1.Width + 10;
end;procedure TForm1.Button1Click(Sender: TObject);
begin
  Image1.Width := Image1.Width - 10;
  Image1.Highe := Image1.Width - 10;
end;procedure TForm1.FormCreate(Sender: TObject);
begin
  Image1.Stretch := True;
end;

Answer 1

procedure TForm1.Button1Click(Sender: TObject);
begin
  Image1.Width := Image1.Width + 10;
  Image1.Highe := Image1.Width + 10;
end;procedure TForm1.Button2Click(Sender: TObject);
begin
  Image1.Width := Image1.Width - 10;
  Image1.Highe := Image1.Width - 10;
end;procedure TForm1.FormCreate(Sender: TObject);
begin
  Image1.Stretch := True;
end;

Answer 2

procedure TForm1.Button1Click(Sender: TObject);
begin
  with Image1 do
  begin
    Width := Width + trunc(Width * 10 / 100);
    Height := Height+ trunc(Height * 10 / 100);
  end;
end;procedure TForm1.Button2Click(Sender: TObject);
begin
  with Image1 do
  begin
    Width := Width - trunc(Width * 10 / 100);
    Height := Height - trunc(Height * 10 / 100);
  end;
end;procedure TForm1.FormCreate(Sender: TObject);
begin
  Image1.Stretch := True;
end;