procedure TForm1.FormCreate(Sender: TObject);
begin
  Edit1.BindingSource := TrackBar1;  //将 TrackBar1 的值绑定在 Edit1
  Label1.BindingSource := TrackBar1; //将 TrackBar1 的值绑定在 Label1
end;
{之后, Edit1.Text 和 Label1.Text 会同步 TrackBar1.Value 值}

procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage(TrackBar1.Data); //TrackBar1.Data <- TrackBar1.Value
  ShowMessage(Label1.Data);    //Label1.Data <- Label1.Text
  ShowMessage(Edit1.Text);     //Edit1.Data <- Edit1.Text
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Edit1.BindingSource := Edit2;
  Edit2.BindingSource := Edit1;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Edit1.BindingName := 'bn1'; //

  {可以通过其上层控件的 FindBinding() 方法找到它}
  ShowMessage(Self.FindBinding('bn1').ClassName);
  ShowMessage(TEdit(FindBinding('bn1')).Text);

  {可以通过其上层控件的 Bingding[] 属性读取或修改其 Data 值}
  Self.Binding['bn1'] := 'NewText';
  ShowMessage(Self.Binding['bn1']); //NewText
end;