C++ structure marshalling in C# problem

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C#

Hi,

I am calling tDeviceProperty structure from My C# code. I tryed lot of options but still not working. Can any one help me in marshalling this code in C#.

Thanks in advance.

typedef struct _FILETIME {
    DWORD dwLowDateTime;
    DWORD dwHighDateTime;
} FILETIME, *PFILETIME, *LPFILETIME;

#define _FILETIME_

#if defined(MIDL_PASS)

typedef struct _LARGE_INTEGER {

#else

typedef union _LARGE_INTEGER {

    struct {
        DWORD LowPart;
        LONG HighPart;
    };

    struct {
        DWORD LowPart;
        LONG HighPart;
    } u;

#endif

    LONGLONG QuadPart;

} LARGE_INTEGER;



typedef LARGE_INTEGER *PLARGE_INTEGER;



struct tDeviceProperty {
      DWORD Tag;
      DWORD Size;
      union _DP value;
};



typedef union _DP

{
      short int           i;
      LONG                l;
      ULONG               ul;
      float               flt;
      double              dbl;
      BOOL        b;
      double              at;
      FILETIME            ft;
      LPSTR               lpszA;
      LPWSTR              lpszW;
      LARGE_INTEGER       li;
      struct tBinary    bin;
      BYTE                reserved[40];
} __UDP;



struct tBinary {
      ULONG size;
      BYTE * bin;
};