我试图在Windows 7中编译Visual Studio 2010中的程序。我收到编译错误**C2061：语法错误：标识符'KNOWN_FOLDER_FLAG'**在Windows标头shlobj.h的标记行：

#if (NTDDI_VERSION >= NTDDI_VISTA)

typedef enum
{
    KF_FLAG_DEFAULT         = 0x00000000,
    KF_FLAG_CREATE          = 0x00008000,
    KF_FLAG_DONT_VERIFY     = 0x00004000,
    KF_FLAG_DONT_UNEXPAND   = 0x00002000,
    KF_FLAG_NO_ALIAS        = 0x00001000,
    KF_FLAG_INIT            = 0x00000800,
    KF_FLAG_DEFAULT_PATH    = 0x00000400,
    KF_FLAG_NOT_PARENT_RELATIVE = 0x00000200,
    KF_FLAG_SIMPLE_IDLIST   = 0x00000100,
    KF_FLAG_ALIAS_ONLY      = 0x80000000,
} KNOWN_FOLDER_FLAG;

DEFINE_ENUM_FLAG_OPERATORS(KNOWN_FOLDER_FLAG);

STDAPI SHGetKnownFolderIDList(__in REFKNOWNFOLDERID rfid,
                              __in DWORD /* KNOWN_FOLDER_FLAG */ dwFlags,
                              __in_opt HANDLE hToken,
                              __deref_out PIDLIST_ABSOLUTE *ppidl);

STDAPI SHSetKnownFolderPath(__in REFKNOWNFOLDERID rfid,
                            __in DWORD /* KNOWN_FOLDER_FLAG */ dwFlags,
                            __in_opt HANDLE hToken,
                            __in PCWSTR pszPath);

STDAPI SHGetKnownFolderPath(__in REFKNOWNFOLDERID rfid,
                            __in DWORD /* KNOWN_FOLDER_FLAG */ dwFlags,
                            __in_opt HANDLE hToken,
                            __deref_out PWSTR *ppszPath);

#endif  // NTDDI_VISTA

#if (NTDDI_VERSION >= NTDDI_WIN7)

STDAPI SHGetKnownFolderItem(__in REFKNOWNFOLDERID rfid,
                            __in KNOWN_FOLDER_FLAG flags, <<<ERROR AT THIS LINE
                            __in_opt HANDLE hToken,
                            __in REFIID riid,
                            __deref_out void **ppv);
#endif // NTDDI_WIN7

在我的程序中，版本宏定义如下

#define NTDDI_VERSION NTDDI_WINXP

它不能编译的原因是什么？
在我看来，我得到错误的部分一定根本不是编译的，但它不知何故是编译的。