C++获取进程启动参数

#include "stdafx.h"
#include 

#include 

#define ProcessBasicInformation 0

typedef struct
{
	USHORT Length;
	USHORT MaximumLength;
	PWSTR  Buffer;
} UNICODE_STRING, *PUNICODE_STRING;

typedef struct
{
	ULONG          AllocationSize;
	ULONG          ActualSize;
	ULONG          Flags;
	ULONG          Unknown1;
	UNICODE_STRING Unknown2;
	HANDLE         InputHandle;
	HANDLE         OutputHandle;
	HANDLE         ErrorHandle;
	UNICODE_STRING CurrentDirectory;
	HANDLE         CurrentDirectoryHandle;
	UNICODE_STRING SearchPaths;
	UNICODE_STRING ApplicationName;
	UNICODE_STRING CommandLine;
	PVOID          EnvironmentBlock;
	ULONG          Unknown[9];
	UNICODE_STRING Unknown3;
	UNICODE_STRING Unknown4;
	UNICODE_STRING Unknown5;
	UNICODE_STRING Unknown6;
} PROCESS_PARAMETERS, *PPROCESS_PARAMETERS;

typedef struct
{
	ULONG               AllocationSize;
	ULONG               Unknown1;
	HINSTANCE           ProcessHinstance;
	PVOID               ListDlls;
	PPROCESS_PARAMETERS ProcessParameters;
	ULONG               Unknown2;
	HANDLE              Heap;
} PEB, *PPEB;

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


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

PROCNTQSIP NtQueryInformationProcess;

BOOL GetProcessCmdLine(DWORD dwPId,__out LPTSTR lpString)
{
	HANDLE                    hProcess;
	PROCESS_BASIC_INFORMATION pbi;
	PEB                       Peb;
	PROCESS_PARAMETERS        ProcParam;
	DWORD                     dwDummy;
	DWORD                     dwSize;
	LPVOID                    lpAddress;

	BOOL RetValue = FALSE;

	//得到进程句柄
	hProcess = OpenProcess(PROCESS_QUERY_INFORMATION|PROCESS_VM_READ,FALSE,dwPId);
	if (!hProcess)
		goto Ret;
	//获取信息
	if (0!=NtQueryInformationProcess(hProcess,0,(PVOID)&pbi,sizeof(PROCESS_BASIC_INFORMATION),NULL))
		goto Ret;
	if (!ReadProcessMemory(hProcess,pbi.PebBaseAddress,&Peb,sizeof(PEB),&dwDummy))
		goto Ret;
	if (!ReadProcessMemory(hProcess,Peb.ProcessParameters,&ProcParam,sizeof(PROCESS_PARAMETERS),&dwDummy))
		goto Ret;

	lpAddress = ProcParam.CommandLine.Buffer;
	dwSize = ProcParam.CommandLine.Length;

	RetValue = ReadProcessMemory( hProcess,lpAddress,(LPVOID)lpString,dwSize,&dwDummy );
Ret:
	if(hProcess)
		CloseHandle (hProcess);
	return RetValue;
}
int _tmain(int argc, _TCHAR* argv[])
{
	NtQueryInformationProcess = (PROCNTQSIP)GetProcAddress(GetModuleHandle(_T("ntdll")),
		"NtQueryInformationProcess");
	if (!NtQueryInformationProcess)
	{
		//MessageBox(0,"无法定位NtQueryInformationProcess，程序退出","启动错误",MB_ICONERROR);
		return -1;
	}
	TCHAR str[255] = {0};
	GetProcessCmdLine(2816, str);

	return 0;
}