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// srcProcessCnt.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include 
   
    #include 
    
     typedef std::vector
     
          VECTOR_INT;size_t  fnGetPidList(VECTOR_INT & vec);int _tmain(int argc, _TCHAR* argv[]){    size_t      nIndex = 0;    size_t      nProcessCnt = 0;    VECTOR_INT  vecPid;    nProcessCnt = fnGetPidList(vecPid);    /// printf PID List    _tprintf(L"PID Counter = %d\r\n", nProcessCnt);    for (nIndex = 0; nIndex < nProcessCnt; nIndex++)    {        _tprintf(L"PID[%d] = %d\r\n", nIndex, vecPid[nIndex]);    }    /** run results    PID Counter = 101    PID[0] = 312    PID[1] = 424    PID[2] = 436    ...    PID[98] = 7880    PID[99] = 8164    PID[100] = 8172    */    getwchar();	return 0;}size_t  fnGetPidList(VECTOR_INT & vec){    int     iIndex = 0;    HANDLE  hProcess = NULL;    /// PID值是4的倍数    for (iIndex = 0; iIndex < 65536; iIndex += 4)    {        hProcess = OpenProcess(PROCESS_VM_READ, FALSE, iIndex);        if (NULL != hProcess)        {            /**            只有2个系统进程无法读取内存(PROCESS_VM_READ)            System PID = 4            System Idle Process PID = 0            */            vec.push_back(iIndex);            CloseHandle(hProcess);        }    }    return vec.size();}
     
    
   

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