The Microsoft Foundation Class Library debug memory allocator can call a user-defined hook function to allow the user to control whether to permit the allocation.
Allocation hook functions are prototyped as:
BOOL AllocHook( size_t nSize, BOOL bObject, LONG lRequestNumber );
| Parameter | Description |
| nSize | The size of the proposed memory allocation. |
| bObject | TRUE if the allocation is for a CObject-derived object. |
| lRequestNumber | The memory allocation's sequence number. |
Return Value
TRUE if you want to permit the allocation; otherwise FALSE.