Techwiki:Win32k/EDD SURFACE

typedef struct _EDD_SURFACE
{
   HANDLE hHmgr;
   PVOID pEntry;
   INT cExcLock;
   HANDLE Tid;
   DD_SURFACE_LOCAL ddsSurfaceLocal;
   DD_SURFACE_MORE ddsSurfaceMore;
   DD_SURFACE_GLOBAL ddsSurfaceGlobal;
   DD_SURFACE_INT ddsSurfaceInt;
   struct _EDD_SURFACE *peSurface_DdNext;
   struct _EDD_SURFACE *peSurface_LockNext;
   ULONG field_C0;
   struct _EDD_DIRECTDRAW_GLOBAL* peDirectDrawGlobal;
   struct _EDD_DIRECTDRAW_LOCAL* peDirectDrawLocal;
   FLONG fl;
   ULONG cLocks;
   ULONG iVisRgnUniqueness;
   BOOL bLost;
   HANDLE hSecure;
   HANDLE hdc;
   HBITMAP hbmGdi;
   ULONG field_E8;
   RECTL rclLock;
   ULONG field_FC[2];
} EDD_SURFACE, *PEDD_SURFACE;