问奇怪的错误C2146和C4430在d3d11shader.h中VS2012

EN

#include "d3dcommon.h" 
//other stuff
typedef struct _D3D11_SIGNATURE_PARAMETER_DESC
{
    LPCSTR                      SemanticName;   
    UINT                        SemanticIndex;  
    UINT                        Register;       
    D3D_NAME                    SystemValueType;
    D3D_REGISTER_COMPONENT_TYPE ComponentType;  
    BYTE                        Mask;                      
    BYTE                        ReadWriteMask;  
    UINT                        Stream;        
    D3D_MIN_PRECISION           MinPrecision;  //Errors here
} D3D11_SIGNATURE_PARAMETER_DESC;

(1) Error   29  error C2146: syntax error : missing ';' before identifier 'MinPrecision'    c:\program files (x86)\windows kits\8.0\include\um\d3d11shader.h    54
(2) Error   30  error C4430: missing type specifier - int assumed. Note: C++ does not support default-int   c:\program files (x86)\windows kits\8.0\include\um\d3d11shader.h    54

#include "d3dApp.h"//This header file is provided by the book


class InitDirect3DApp : public D3DApp
{
public:
    InitDirect3DApp(HINSTANCE hInstance);
    ~InitDirect3DApp();

    bool Init();
    void OnResize();
    void UpdateScene(float dt);
    void DrawScene(); 
};

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE prevInstance,
               PSTR cmdLine, int showCmd)
{
// Enable run-time memory check for debug builds.
#if defined(DEBUG) | defined(_DEBUG)
    _CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif

    InitDirect3DApp theApp(hInstance);

    if( !theApp.Init() )
        return 0;

    return theApp.Run();
}

 Init Direct3DApp::InitDirect3DApp(HINSTANCE hInstance)
  : D3DApp(hInstance) 
{
 }

 InitDirect3DApp::~InitDirect3DApp()
{
}

 bool InitDirect3DApp::Init()
{
    if(!D3DApp::Init())
        return false;

    return true;
}

 void InitDirect3DApp::OnResize()
{
    D3DApp::OnResize();
}

void InitDirect3DApp::UpdateScene(float dt)
{

}

void InitDirect3DApp::DrawScene()
{
    assert(md3dImmediateContext);
    assert(mSwapChain);

    md3dImmediateContext->ClearRenderTargetView(mRenderTargetView,     reinterpret_cast<const float*>(&Colors::Blue));
    md3dImmediateContext->ClearDepthStencilView(mDepthStencilView, D3D11_CLEAR_DEPTH|D3D11_CLEAR_STENCIL, 1.0f, 0);

    HR(mSwapChain->Present(0, 0));
}

   31   IntelliSense: identifier "D3D_MIN_PRECISION" is undefined   c:\Program Files (x86)\Windows Kits\8.0\Include\um\d3d11shader.h    54