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HEAPENTRY32 structure (tlhelp32.h)

  • Article

Describes one entry (block) of a heap that is being examined.

Syntax

typedef struct tagHEAPENTRY32 {
  SIZE_T    dwSize;
  HANDLE    hHandle;
  ULONG_PTR dwAddress;
  SIZE_T    dwBlockSize;
  DWORD     dwFlags;
  DWORD     dwLockCount;
  DWORD     dwResvd;
  DWORD     th32ProcessID;
  ULONG_PTR th32HeapID;
} HEAPENTRY32;

Members

dwSize

The size of the structure, in bytes. Before calling the Heap32First function, set this member to sizeof(HEAPENTRY32). If you do not initialize dwSize, Heap32First fails.

hHandle

A handle to the heap block.

dwAddress

The linear address of the start of the block.

dwBlockSize

The size of the heap block, in bytes.

dwFlags

This member can be one of the following values.

Value Meaning
LF32_FIXED
 The memory block has a fixed (unmovable) location.
LF32_FREE
 The memory block is not used.
LF32_MOVEABLE
 The memory block location can be moved.

dwLockCount

This member is no longer used and is always set to zero.

dwResvd

Reserved; do not use or alter.

th32ProcessID

The identifier of the process that uses the heap.

th32HeapID

The heap identifier. This is not a handle, and has meaning only to the tool help functions.

Requirements

Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header tlhelp32.h

See also

Heap32First

Heap32Next