GetProcessMemoryInfo function

Retrieves information about the memory usage of the specified process.

Syntax


BOOL WINAPI GetProcessMemoryInfo(
  _In_   HANDLE Process,
  _Out_  PPROCESS_MEMORY_COUNTERS ppsmemCounters,
  _In_   DWORD cb
);

Parameters

Process [in]

A handle to the process. The handle must have the PROCESS_QUERY_INFORMATION or PROCESS_QUERY_LIMITED_INFORMATION access right and the PROCESS_VM_READ access right. For more information, see Process Security and Access Rights.

Windows Server 2003 and Windows XP:  The handle must have the PROCESS_QUERY_INFORMATION and PROCESS_VM_READ access rights.

ppsmemCounters [out]

A pointer to the PROCESS_MEMORY_COUNTERS or PROCESS_MEMORY_COUNTERS_EX structure that receives information about the memory usage of the process.

cb [in]

The size of the ppsmemCounters structure, in bytes.

Return value

If the function succeeds, the return value is nonzero.

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

Remarks

Starting with Windows 7 and Windows Server 2008 R2, Psapi.h establishes version numbers for the PSAPI functions. The PSAPI version number affects the name used to call the function and the library that a program must load.

If PSAPI_VERSION is 2 or greater, this function is defined as K32GetProcessMemoryInfo in Psapi.h and exported in Kernel32.lib and Kernel32.dll. If PSAPI_VERSION is 1, this function is defined as GetProcessMemoryInfo in Psapi.h and exported in Psapi.lib and Psapi.dll as a wrapper that calls K32GetProcessMemoryInfo.

Programs that must run on earlier versions of Windows as well as Windows 7 and later versions should always call this function as GetProcessMemoryInfo. To ensure correct resolution of symbols, add Psapi.lib to the TARGETLIBS macro and compile the program with -DPSAPI_VERSION=1. To use run-time dynamic linking, load Psapi.dll.

Examples

For an example, see Collecting Memory Usage Information for a Process.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Psapi.h

Library

Kernel32.lib on Windows 7 and Windows Server 2008 R2;
Psapi.lib (if PSAPI_VERSION=1) on Windows 7 and Windows Server 2008 R2;
Psapi.lib on Windows Server 2008, Windows Vista, Windows Server 2003, and Windows XP

DLL

Kernel32.dll on Windows 7 and Windows Server 2008 R2;
Psapi.dll (if PSAPI_VERSION=1) on Windows 7 and Windows Server 2008 R2;
Psapi.dll on Windows Server 2008, Windows Vista, Windows Server 2003, and Windows XP

See also

EnumProcesses
Memory Performance Information
PROCESS_MEMORY_COUNTERS
PROCESS_MEMORY_COUNTERS_EX
Process Memory Usage Information
PSAPI Functions

 

 

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