[Tips] Get process memory information with process id by GetProcessMemoryInfo API

Do You want to get memory of process with process id? or you can consider do it with GetProcessMemoryInfo API.

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Overview:

GetProcessMemoryInfo (HANDLE, PPROCESS_MEMORY_COUNTERS, DWORD)

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.

Now we'll write the source code help you get memory info.
Below picture is description for using GetProcessMemoryInfo to get Skype program RAM used
Private Working Set is WorkingSetSize attribute

Source code

Using WorkingSetSize div for 1024 to get memory in PC and This code will be show all process and Ram used is active in your PC.

// GetMemoryProcessInformation.cpp : Defines the entry point for the console app
/* ***************************************************
 Developer: Zidane (huuvi168@gmail.com)
 Last Modified: 2015-08-28
 Blog: https://learn-tech-tips.blogpsot.com
 * **************************************************/

#include "stdafx.h"
#include <windows.h>
#include <stdio.h>
#include <psapi.h>
#include <conio.h>

#pragma comment(lib, "psapi.lib") //remember added it

void PrintMemoryInfo( DWORD processID )
{
    HANDLE hProcess;
    PROCESS_MEMORY_COUNTERS pmc;

    printf( "\nProcess ID: %u\n", processID );

    // Print information about the memory usage of the process.
    hProcess = OpenProcess(  PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processID );
    if (NULL == hProcess)
        return;

    if ( GetProcessMemoryInfo( ( hProcess, &pmc, sizeof(pmc)) )
    {
        printf( "\tWorkingSetSize: 0x%08X - %u\n",  pmc.WorkingSetSize,  
           pmc.WorkingSetSize / 1024);        
        printf( "\tQuotaPeakPagedPoolUsage: 0x%08X - %u\n", 
           pmc.QuotaPeakPagedPoolUsage ,  pmc.QuotaPeakPagedPoolUsage / 1024);
        printf( "\tQuotaPagedPoolUsage: 0x%08X - %u\n", pmc.QuotaPagedPoolUsage, 
           pmc.QuotaPagedPoolUsage / 1024);
        printf( "\tQuotaPeakNonPagedPoolUsage: 0x%08X - %u\n", 
           pmc.QuotaPeakNonPagedPoolUsage,pmc.QuotaPeakNonPagedPoolUsage / 1024 );
        printf( "\tQuotaNonPagedPoolUsage: 0x%08X - %u\n",pmc.QuotaNonPagedPoolUsage , 
           pmc.QuotaNonPagedPoolUsage / 1024);
        printf( "\tPagefileUsage: 0x%08X - %u\n", pmc.PagefileUsage, 
           pmc.PagefileUsage  / 1024 ); 
        printf( "\tPeakPagefileUsage: 0x%08X - %u\n", pmc.PeakPagefileUsage, 
           pmc.PeakPagefileUsage / 1024 );
        printf( "\tcb: 0x%08X - %u\n", pmc.cb , pmc.cb / 1024);     
    }

    CloseHandle( hProcess );
}

int _tmain(int argc, _TCHAR* argv[])
{
    // Get the list of process identifiers.
    DWORD aProcesses[1024], cbNeeded, cProcesses;
    unsigned int i;

    if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
        return 1;

    // Calculate how many process identifiers were returned.
    cProcesses = cbNeeded / sizeof(DWORD);

    // Print the memory usage for each process
    for ( i = 0; i < cProcesses; i++ )
        PrintMemoryInfo( aProcesses[i] );

    _getch();
     return 0;
}

Note:

You will see this error when using GetProcessMemoryInfo

Error 1 error LNK2019: unresolved external symbol _GetProcessMemoryInfo@12 referenced in function "void __cdecl PrintMemoryInfo(unsigned long)" (?PrintMemoryInfo@@YAXK@Z)

Error 2 error LNK2019: unresolved external symbol _EnumProcesses@12 referenced in function _main

Error 3 fatal error LNK1120: 2 unresolved externals

To fix this issue, I added "pragma comment" instruction to places a library-search record in the object file and compiling is now working fine.

#include <windows.h>
#include <stdio.h>
#include <psapi.h>
#pragma comment(lib, “psapi.lib”) //added

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