typedef struct _GUID
{
    unsigned long  Data1;
    unsigned short Data2;
    unsigned short Data3;
    byte           Data4[8];
} GUID;
 
typedef GUID UUID;
 
typedef struct _FILETIME
{
    unsigned long dwLowDateTime;
    unsigned long dwHighDateTime;
} FILETIME;
 
typedef struct _LARGE_INTEGER 
{
    __int64 QuadPart;
} LARGE_INTEGER;
 
typedef __int64 LONGLONG;
typedef unsigned __int64 ULONGLONG;
typedef long NTSTATUS;
 
typedef unsigned long DWORD;