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ZeroMemory macro

  • Article

Fills a block of memory with zeros.

To avoid any undesired effects of optimizing compilers, use the SecureZeroMemory function.

Syntax

c++ 
void ZeroMemory(
  [in] PVOID  Destination,
  [in] SIZE_T Length
);

Parameters

  • Destination [in]
    A pointer to the starting address of the block of memory to fill with zeros.

  • Length [in]
    The size of the block of memory to fill with zeros, in bytes.

Return value

This macro has no return value.

Remarks

Many programming languages include syntax for initializing complex variables to zero. There can be differences between the results of these operations and the ZeroMemory function. Use ZeroMemory to clear a block of memory in any programming language.

This macro is defined as the RtlZeroMemory macro. For more information, see WinBase.h and WinNT.h.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

 WinBase.h (include Windows.h)

See also

CopyMemory

FillMemory

MoveMemory

SecureZeroMemory