PEB ProcessParameters on different OSes

Does anyone know if the ProcessParameters (RTL_USER_PROCESS_PARAMETERS) member of PEB (PEB+10h) have the same structure on different OSes (NT/2k/XP/2k3)? I don't want my code to break with false assumptions

On 2k it's like this:

typedef struct _RTL_USER_PROCESS_PARAMETERS {
	ULONG MaximumLength;
	ULONG Length;
	ULONG Flags;
	ULONG DebugFlags;
	PVOID ConsoleHandle;
	ULONG ConsoleFlags;
	HANDLE StdInputHandle;
	HANDLE StdOutputHandle;
	HANDLE StdErrorHandle;
	UNICODE_STRING CurrentDirectoryPath;
	HANDLE CurrentDirectoryHandle;
	UNICODE_STRING DllPath;
	UNICODE_STRING ImagePathName;
	UNICODE_STRING CommandLine;
	PVOID Environment;
	ULONG StartingPositionLeft;
	ULONG StartingPositionTop;
	ULONG Width;
	ULONG Height;
	ULONG CharWidth;
	ULONG CharHeight;
	ULONG ConsoleTextAttributes;
	ULONG WindowFlags;
	ULONG ShowWindowFlags;
	UNICODE_STRING WindowTitle;
	UNICODE_STRING DesktopName;
	UNICODE_STRING ShellInfo;
	UNICODE_STRING RuntimeData;
	RTL_DRIVE_LETTER_CURDIR DLCurrentDirectory[0x20];
} RTL_USER_PROCESS_PARAMETERS, *PRTL_USER_PROCESS_PARAMETERS;

Using WinDBG in my box: (Windows XP SP1)

lkd> dt _RTL_USER_PROCESS_PARAMETERS
   +0x000 MaximumLength    : Uint4B
   +0x004 Length           : Uint4B
   +0x008 Flags            : Uint4B
   +0x00c DebugFlags       : Uint4B
   +0x010 ConsoleHandle    : Ptr32 Void
   +0x014 ConsoleFlags     : Uint4B
   +0x018 StandardInput    : Ptr32 Void
   +0x01c StandardOutput   : Ptr32 Void
   +0x020 StandardError    : Ptr32 Void
   +0x024 CurrentDirectory : _CURDIR
   +0x030 DllPath          : _UNICODE_STRING
   +0x038 ImagePathName    : _UNICODE_STRING
   +0x040 CommandLine      : _UNICODE_STRING
   +0x048 Environment      : Ptr32 Void
   +0x04c StartingX        : Uint4B
   +0x050 StartingY        : Uint4B
   +0x054 CountX           : Uint4B
   +0x058 CountY           : Uint4B
   +0x05c CountCharsX      : Uint4B
   +0x060 CountCharsY      : Uint4B
   +0x064 FillAttribute    : Uint4B
   +0x068 WindowFlags      : Uint4B
   +0x06c ShowWindowFlags  : Uint4B
   +0x070 WindowTitle      : _UNICODE_STRING
   +0x078 DesktopInfo      : _UNICODE_STRING
   +0x080 ShellInfo        : _UNICODE_STRING
   +0x088 RuntimeData      : _UNICODE_STRING
   +0x090 CurrentDirectores : [32] _RTL_DRIVE_LETTER_CURDIR