Initialising a STRUCT with DUPs in MASM

I'd like to initialise a STRUCT with a DUP(<>) in it, in particular:

MyTokenPrivileges TOKEN_PRIVILEGES <>

Anyone who's done a reasonable amount of work with MASM on Windows structures should be able to provide the answer here.  In the past I've had to define these structures as bytes instead of properly, but I really want to know the correct way of doing it, as I use MASM a lot, and it's driving me mad!

Sample code (STRUCTs from Hutch's MASM32):


 ANYSIZE_ARRAY equ 1
 LUID STRUCT
   LowPart   DWORD      ?
   HighPart  DWORD      ?
 LUID ENDS
 LUID_AND_ATTRIBUTES STRUCT
   Luid LUID <>
   Attributes dd ?
 LUID_AND_ATTRIBUTES ENDS
 TOKEN_PRIVILEGES STRUCT
   PrivilegeCount DWORD      ?
   Privileges LUID_AND_ATTRIBUTES ANYSIZE_ARRAY dup(<>)
 TOKEN_PRIVILEGES ENDS

 ; Nested STRUCTs are no problem
 ASampleLuidAndAttributes LUID_AND_ATTRIBUTES <<0, 0>, 0>

 ; Nor are DUP()s with normal types:
 _GUID STRUCT
   Data1           DWORD ?
   Data2           WORD ?
   Data3           WORD ?
   Data4           BYTE 8 dup (?)
 _GUID ENDS
 InitialisedGUID _GUID <0, 0, 0, <0c0h, 0, 0, 0, 0, 0, 0, 46h>>

 ; But how do I initialise this with PrivilegeCount = 1?
 MyTokenPrivileges TOKEN_PRIVILEGES <>
 ; I think it should be:
 ;  MyTokenPrivileges TOKEN_PRIVILEGES <1, < <<0, 0>, 0> >>
 ; (i.e. one set of <> for the DUP, as in _GUID,
 ;  and then the normal syntax for a LUID_AND_ATTRIBUTES structure inside).
 ; It returns error A2177: nested structure improperly initialized


And I don't want to change the line to Privileges LUID_AND_ATTRIBUTES <> (although that works).

Thanks to anyone who knows how to do this without resorting to a byte array or initialising it at runtime,
    Mark