通过进程名称获取进程ID、通过子进程ID获取其父进程ID及通过进程ID获取进程名称

最近一个MFC项目里有个需求是：需要根据一个进程名称获取其父进程名称。于是查了些资料整理出来份代码，并进行了些测试结果OK。直接拿来即可当工具类使用，以下贴上代码：

头文件GetProcessInfo.h：

#pragma once
#include 

#define ProcessBasicInformation 0

typedef struct
{
	DWORD ExitStatus;
	DWORD PebBaseAddress;
	DWORD AffinityMask;
	DWORD BasePriority;
	ULONG UniqueProcessId;
	ULONG InheritedFromUniqueProcessId;
}   PROCESS_BASIC_INFORMATION;

typedef LONG (WINAPI *PROCNTQSIP)(HANDLE,UINT,PVOID,ULONG,PULONG);

class GetProcessInfo
{
public:
	GetProcessInfo(void);
	~GetProcessInfo(void);

	//通过进程名称获取进程ID，同时也可通过传个引用参数获取到父进程ID，同下面GetParentProcessId获取的结果一致
	DWORD GetProcessIdFromName(CString strProcessName, DWORD &dwParentProcessId);

	//通过子进程ID获取其父进程ID
	DWORD GetParentProcessId(DWORD dwChildProcessId);

	//通过进程ID获取进程名称
	CString GetProcessNameFromId(DWORD dwProcessId);
};

源文件GetProcessInfo.cpp内容：

#include "stdafx.h"
#include "GetProcessInfo.h"
#include 

#pragma comment (lib,"Psapi.lib")

#include 

GetProcessInfo :: GetProcessInfo(void)
{
}

GetProcessInfo :: ~GetProcessInfo(void)
{
}

DWORD GetProcessInfo :: GetProcessIdFromName(CString strProcessName, DWORD &dwParentProcessId)
{
	DWORD dwProcessID =0;

	//进行一个进程快照
	HANDLE hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
	if (hProcessSnap == INVALID_HANDLE_VALUE)
	{
		OutputDebugString(_T("进程快照失败！"));
		return FALSE;
	}

	PROCESSENTRY32 pe;
	pe.dwSize = sizeof(pe);
	BOOL bProcess = Process32First(hProcessSnap,&pe);
	while (bProcess)
	{
		if (strProcessName.CompareNoCase(pe.szExeFile) == 0)
		{
			dwProcessID = pe.th32ProcessID;
			dwParentProcessId = pe.th32ParentProcessID; //pe结构中包含有父进程的ID
		}
		bProcess = Process32Next(hProcessSnap,&pe);
	}

	CloseHandle(hProcessSnap);

	return dwProcessID;
}

DWORD GetProcessInfo :: GetParentProcessId(DWORD dwChildProcessId)
{
	//NtQueryInformationProcess函数的使用需要加载进ntdll.dll
	PROCNTQSIP NtQueryInformationProcess = (PROCNTQSIP)GetProcAddress(GetModuleHandle(_T("ntdll.dll")), "NtQueryInformationProcess");

	if(!NtQueryInformationProcess)
	{
		OutputDebugString(_T("ntdll.dll中检索NtQueryInformationProcess失败！"));
	}

	DWORD dwParentProcessId = 0;
	LONG status;
	PROCESS_BASIC_INFORMATION pbi;

	HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,dwChildProcessId);
	if (!hProcess)
	{
		OutputDebugString(_T("OpenProcess Error！"));
		return FALSE;
	}

	status = NtQueryInformationProcess( hProcess, ProcessBasicInformation, (PVOID)&pbi, sizeof(PROCESS_BASIC_INFORMATION), NULL);

	if  (!status)
	{
		dwParentProcessId = (DWORD)pbi.InheritedFromUniqueProcessId;
		CString strParentID;
		strParentID.Format(_T("%d"), dwParentProcessId);
		OutputDebugString(_T("ParentProcessID:")+strParentID);	
	}

	return dwParentProcessId;
}

CString GetProcessInfo :: GetProcessNameFromId(DWORD dwProcessId)
{
	CString strProcessName;
	HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION|PROCESS_VM_READ, FALSE, dwProcessId);
	if (NULL != hProcess )
	{
		
		HMODULE hMod;
		DWORD cbNeeded;
		if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &cbNeeded) )
		{
			GetModuleBaseName( hProcess, hMod, strProcessName.GetBuffer(MAX_PATH), MAX_PATH);
			strProcessName.ReleaseBuffer();
		}
	}
	return strProcessName;
}

用到时，直接将该头文件和源文件引入项目，在需要用到的地方定义一个GetProcessInfo对象，然后传参数调用其相关函数即可。