Techwiki:Win32k/SHAREDINFO

typedef struct _WNDMSG
{
  DWORD maxMsgs;
  DWORD abMsgs;
} WNDMSG, *PWNDMSG;
//
//
typedef struct _SHAREDINFO
{                                 // W2k XP
  PSERVERINFO  psi;               // 000
  PHANDLEENTRY aheList;           // 004
  PDISPLAYINFO pDisplayInfo;      // 008
  ULONG_PTR    ulSharedDelta;     // 00c
  WNDMSG       awmControl[31];    // 010 010 W2k size is 27
  WNDMSG       DefWindowMsgs;     // 0e8 108
  WNDMSG       DefWindowSpecMsgs; // 0f0 110
} SHAREDINFO, *PSHAREDINFO;