Callbacks Hook structures

!object \\ObjectTypes // commond to get Objects aaddress

typedef struct _CALLBACK_ENTRY {
    WORD Version; // 0x0
    WORD OperationRegistrationCount; // 0x2
    DWORD unk1; // 0x4
    PVOID RegistrationContext; // 0x8
    UNICODE_STRING Altitude; // 0x10
} CALLBACK_ENTRY, *PCALLBACK_ENTRY; // header size: 0x20 (0x6C if you count the array afterwards - this is only the header. The array of CALLBACK_ENTRY_ITEMs is useless.)

// CALLBACK_ENTRY_ITEM
typedef struct _CALLBACK_ENTRY_ITEM {
    LIST_ENTRY CallbackList; // 0x0
    OB_OPERATION Operations; // 0x10
    DWORD Active; // 0x14
    CALLBACK_ENTRY *CallbackEntry; // 0x18
    PVOID ObjectType; // 0x20
    POB_PRE_OPERATION_CALLBACK PreOperation; // 0x28  this is address of first callback function //
    POB_POST_OPERATION_CALLBACK PostOperation; // 0x30  this is address of second callback function
    QWORD unk1; // 0x38
} CALLBACK_ENTRY_ITEM, *PCALLBACK_ENTRY_ITEM; // size: 0x40


typedef struct _OBJECT_TYPE {
 LIST_ENTRY TypeList;
 UNICODE_STRING Name;
 VOID* DefaultObject;
 UCHAR Index;
 unsigned __int32 TotalNumberOfObjects;
 unsigned __int32 TotalNumberOfHandles;
 unsigned __int32 HighWaterNumberOfObjects;
 unsigned __int32 HighWaterNumberOfHandles;
 OBJECT_TYPE_INITIALIZER TypeInfo;
 EX_PUSH_LOCK TypeLock;
 unsigned __int32 Key;
 LIST_ENTRY CallbackList; // A linked list of CALLBACK_ENTRY_ITEMs, which is what we want!
}OBJECT_TYPE, *POBJECT_TYPE;