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GlobalSize function

Retrieves the current size of the specified global memory object, in bytes.

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

C++


SIZE_T WINAPI GlobalSize(
  _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 the size of the specified global memory object, in bytes.

If the specified handle is not valid or if the object has been discarded, the return value is zero. To get extended error information, call GetLastError.

Remarks

The size of a memory block may be larger than the size requested when the memory was allocated.

To verify that the specified object's memory block has not been discarded, use the GlobalFlags function before calling GlobalSize.

Requirements

Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	WinBase.h (include Windows.h)
Library	Kernel32.lib
DLL	Kernel32.dll