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GlobalDiscard macro

Discards the specified global memory block. The lock count of the memory object must be zero.

Note  The global functions have greater overhead and provide fewer features than other memory management functions. New applications should use the heap functions unless documentation states that a global function should be used. For more information, see Global and Local Functions.

Syntax


HGLOBAL WINAPI GlobalDiscard(
  [in] HGLOBAL hMem
);

Parameters

hMem [in]

A handle to the global memory object. This handle is returned by either the GlobalAlloc or GlobalReAlloc function.

Return value

If the function succeeds, the return value is a handle to the memory object.

If the function fails, the return value is NULL. To get extended error information, call GetLastError.

Remarks

Although GlobalDiscard discards the object's memory block, the handle to the object remains valid. The process can subsequently pass the handle to the GlobalReAlloc function to allocate another global memory block identified by the same handle.

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

Global and Local Functions
GlobalAlloc
GlobalReAlloc
Memory Management Functions

 

 

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