GetProcessMemoryInfo function (psapi.h)

Retrieves information about the memory usage of the specified process.

Syntax

BOOL GetProcessMemoryInfo(
  [in]  HANDLE                   Process,
  [out] PPROCESS_MEMORY_COUNTERS ppsmemCounters,
  [in]  DWORD                    cb
);

Parameters

[in] Process

A handle to the process. The handle must have the PROCESS_QUERY_INFORMATION or PROCESS_QUERY_LIMITED_INFORMATION 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.

[out] ppsmemCounters

A pointer to the PROCESS_MEMORY_COUNTERS, PROCESS_MEMORY_COUNTERS_EX, or PROCESS_MEMORY_COUNTERS_EX2 structure that receives information about the memory usage of the process.

[in] cb

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

See also

EnumProcesses

Memory Performance Information

PROCESS_MEMORY_COUNTERS

PROCESS_MEMORY_COUNTERS_EX

PSAPI Functions

Process Memory Usage Information