F1026 File not found DockForm.dcu

xe6

[dcc32 Fatal Error] ToolsAPI.pas(18): F1026 File not found: ‘E:\...\DockForm.dcu‘

delphi，xe6，包含了DesignEditors, DesignIntf文件后，报错。ToolsAPI.pas里有DockForm的引用

这要是安装控件，添加DesignIde.dcp到成功就可以了

但现在普通的vcl app

新建空白工程，加入下面代码，CB XE6中可以编译成功，Delphi XE6反倒不成功了

#include <DesignEditors.hpp>
class TFieldsProperty : public TStringProperty
{
public:
    void __fastcall GetValues(TGetStrProc Proc);
    TPropertyAttributes __fastcall GetAttributes(void);

};

uses  DesignEditors
type
  TFieldsProperty = class(TStringProperty)
  public
    procedure GetValues(Proc: TGetStrProc); override;
    function GetAttributes: TPropertyAttributes; override;
  end;

F1026 File not found DockForm.dcu