ComponentCount 与 ControlCount 区别

   ShowMessage(panel.ComponentCount.ToString);
  ShowMessage(panel.ControlCount.ToString);
componetcount怎么与 controlcount不一样  

 

 

procedure TForm4.btn4Click(Sender: TObject);
var
  I: Integer;
begin
  //测试ControlCount
  with TButton.Create(pnl1) do
  begin
    Parent := pnl1;
  end;
  with TButton.Create(pnl1) do
  begin
    Parent := Self;
  end;
  with TButton.Create(Self) do
  begin
    Parent := Self;
  end;
  with TButton.Create(Self) do
  begin
    Parent := pnl1;
  end;
  ShowMessage(pnl1.ControlCount.ToString);//结果是2
  ShowMessage(pnl1.ComponentCount.ToString);//结果是2


  //我的错误结论：
  //xxx.ControlCount --- 算的是 Owner 是xxx , parent也为xxx的 且是可视控件
  //xxx.ComponentCount  --- 算的是 owner 是xxx, parent为任何的组件(包含可视与非可视控件）

  //我师傅的正确结论死记：
//  controlcount与owner无关
//  只与parent有关
//  ComponentCount 与parent无关 只与 owner有关
end;

 

 pnl2中 包含一个 btn23和 pnl3
pnl3中包含一个 btn24