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.

Requirements

Header: afx.h

See Also

Reference

AfxMessageBox

Concepts

MFC Macros and Globals