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AfxSetAllocHook

Sets a hook that enables calling of the specified function before each memory block is allocated.

AFX_ALLOC_HOOK AfxSetAllocHook(
   AFX_ALLOC_HOOK pfnAllocHook 
); 

Parameters

pfnAllocHook
Specifies the name of the function to call. See the Remarks for the prototype of an allocation function.

Return Value

Nonzero if you want to permit the allocation; otherwise 0.

Remarks

The Microsoft Foundation Class Library debug-memory allocator can call a user-defined hook function to allow the user to monitor a memory allocation and to control whether the allocation is permitted. Allocation hook functions are prototyped as follows:

BOOL AFXAPI AllocHook( size_t nSize, BOOL bObject, LONG lRequestNumber );

nSize
The size of the proposed memory allocation.
bObject
TRUE if the allocation is for a CObject-derived object; otherwise FALSE.
lRequestNumber
The memory allocation's sequence number.

Note that the AFXAPI calling convention implies that the callee must remove the parameters from the stack.

See Also

MFC Macros and Globals | AfxMessageBox

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