src/WhoUses/SystemInfo.cpp

// Written by Zoltan Csizmadia, zoltan_csizmadia@yahoo.com
// For companies(Austin,TX): If you would like to get my resume, send an email.
//
// The source is free, but if you want to use it, mention my name and e-mail
// address
//
///////////////////////////////////////////////////////////////////////////////
//
// SystemInfo.cpp v1.1
//
// History:
// 
// Date      Version     Description
// ----------------------------------------------------------------------------
// 10/16/00	 1.0	     Initial version
// 11/09/00  1.1         NT4 doesn't like if we bother the System process fix :)
//                       SystemInfoUtils::GetDeviceFileName() fix (subst drives
//                       added)
//                       NT Major version added to INtDLL class
//
///////////////////////////////////////////////////////////////////////////////

#include <windows.h>
#include <process.h>
#include <tchar.h>
#include <stdio.h>
#include "SystemInfo.h"


#include <sstream>
using std::stringstream;

#ifndef WINNT
#error You need Windows NT to use this source code. Define WINNT!
#endif

///////////////////////////////////////////////////////////////////////////////
//
// SystemInfoUtils
//
///////////////////////////////////////////////////////////////////////////////

// From wide char string to string
void SystemInfoUtils::LPCWSTR2string( LPCWSTR strW, string& str )
{
#ifdef UNICODE
	// if it is already UNICODE, no problem
	str = strW;
#else
	str = _T("");

	TCHAR* actChar = (TCHAR*)strW;

	if ( actChar == _T('\0') )
		return;

	ULONG len = wcslen(strW) + 1;
	TCHAR* pBuffer = new TCHAR[ len ];
	TCHAR* pNewStr = pBuffer;

	while ( len-- )
	{
		*(pNewStr++) = *actChar;
		actChar += 2;
	}

	str = pBuffer;

	delete [] pBuffer;
#endif
}

// From wide char string to unicode
void SystemInfoUtils::Unicode2string( UNICODE_STRING* strU, string& str )
{
	if ( *(DWORD*)strU != 0 )
		LPCWSTR2string( (LPCWSTR)strU->Buffer, str );
	else
		str = _T("");
}

// From device file name to DOS filename
BOOL SystemInfoUtils::GetFsFileName( LPCTSTR lpDeviceFileName,
		string& fsFileName )
{
	BOOL rc = FALSE;

	TCHAR lpDeviceName[0x1000];
	TCHAR lpDrive[3] = _T("A:");

	// Iterating through the drive letters
	for ( TCHAR actDrive = _T('A'); actDrive <= _T('Z'); actDrive++ ) {
		lpDrive[0] = actDrive;

		// Query the device for the drive letter
		if ( QueryDosDevice( lpDrive, lpDeviceName, 0x1000 ) != 0 ) {
			// Network drive?
			if ( _tcsnicmp( _T("\\Device\\LanmanRedirector\\"),
						lpDeviceName, 25 ) == 0 ) {
				//Mapped network drive 

				char cDriveLetter;
				DWORD dwParam;

				TCHAR lpSharedName[0x1000];

				if ( _stscanf(  lpDeviceName, 
					_T("\\Device\\LanmanRedirector\\;%c:%d\\%s"), 
					&cDriveLetter, 
					&dwParam, 
					lpSharedName ) != 3 )
					continue;

				_tcscpy( lpDeviceName,
					_T("\\Device\\LanmanRedirector\\") );
				_tcscat( lpDeviceName, lpSharedName );
			}
			
			// Is this the drive letter we are looking for?
			if ( _tcsnicmp( lpDeviceName, lpDeviceFileName,
						_tcslen( lpDeviceName ) ) == 0 )
			{
				fsFileName = lpDrive;
				fsFileName += (LPCTSTR)( lpDeviceFileName
						+ _tcslen( lpDeviceName ) );

				rc = TRUE;

				break;
			}
		}
	}

	return rc;
}

// From DOS file name to device file name
BOOL SystemInfoUtils::GetDeviceFileName( LPCTSTR lpFsFileName,
		string& deviceFileName )
{
	BOOL rc = FALSE;
	TCHAR lpDrive[3];

	// Get the drive letter 
	// unfortunetaly it works only with DOS file names
	_tcsncpy( lpDrive, lpFsFileName, 2 );
	lpDrive[2] = _T('\0');

	TCHAR lpDeviceName[0x1000];

	// Query the device for the drive letter
	if ( QueryDosDevice( lpDrive, lpDeviceName, 0x1000 ) != 0 )
	{
		// Subst drive?
		if ( _tcsnicmp( _T("\\??\\"), lpDeviceName, 4 ) == 0 )
		{
			deviceFileName = lpDeviceName + 4;
			deviceFileName += lpFsFileName + 2;

			return TRUE;
		}
		else
		// Network drive?
		if ( _tcsnicmp( _T("\\Device\\LanmanRedirector\\"),
					lpDeviceName, 25 ) == 0 ) {
			//Mapped network drive 

			char cDriveLetter;
			DWORD dwParam;

			TCHAR lpSharedName[0x1000];

			if ( _stscanf(  lpDeviceName, 
				_T("\\Device\\LanmanRedirector\\;%c:%d\\%s"), 
				&cDriveLetter, 
				&dwParam, 
				lpSharedName ) != 3 )
				return FALSE;

			_tcscpy( lpDeviceName,
					_T("\\Device\\LanmanRedirector\\") );
			_tcscat( lpDeviceName, lpSharedName );
		}

		_tcscat( lpDeviceName, lpFsFileName + 2 );

		deviceFileName = lpDeviceName;

		rc = TRUE;
	}

	return rc;
}

//Get NT version
DWORD SystemInfoUtils::GetNTMajorVersion()
{
   OSVERSIONINFOEX osvi;
   BOOL bOsVersionInfoEx;
   
   // Try calling GetVersionEx using the OSVERSIONINFOEX structure,
   // which is supported on Windows 2000.
   //
   // If that fails, try using the OSVERSIONINFO structure.

   ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
   osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

   bOsVersionInfoEx = GetVersionEx ((OSVERSIONINFO *) &osvi);

   if( bOsVersionInfoEx == 0 )
   {
      // If OSVERSIONINFOEX doesn't work, try OSVERSIONINFO.

      osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
      if (! GetVersionEx ( (OSVERSIONINFO *) &osvi) ) 
         return FALSE;
   }

   return osvi.dwMajorVersion;
}

///////////////////////////////////////////////////////////////////////////////
//
// INtDll
//
///////////////////////////////////////////////////////////////////////////////
INtDll::PNtQuerySystemInformation INtDll::NtQuerySystemInformation = NULL;
INtDll::PNtQueryObject INtDll::NtQueryObject = NULL;
INtDll::PNtQueryInformationThread	INtDll::NtQueryInformationThread = NULL;
INtDll::PNtQueryInformationFile	INtDll::NtQueryInformationFile = NULL;
INtDll::PNtQueryInformationProcess INtDll::NtQueryInformationProcess = NULL;
DWORD INtDll::dwNTMajorVersion = SystemInfoUtils::GetNTMajorVersion();

BOOL INtDll::NtDllStatus = INtDll::Init();

BOOL INtDll::Init()
{
	// Get the NtDll function pointers
	NtQuerySystemInformation = (PNtQuerySystemInformation)
		GetProcAddress( GetModuleHandle( _T( "ntdll.dll" ) ),
                    _T("NtQuerySystemInformation") );

	NtQueryObject = (PNtQueryObject)
		GetProcAddress(	GetModuleHandle( _T( "ntdll.dll" ) ),
                    _T("NtQueryObject") );

	NtQueryInformationThread = (PNtQueryInformationThread)
		GetProcAddress(	GetModuleHandle( _T( "ntdll.dll" ) ),
                    _T("NtQueryInformationThread") );

	NtQueryInformationFile = (PNtQueryInformationFile)
		GetProcAddress(	GetModuleHandle( _T( "ntdll.dll" ) ),
                    _T("NtQueryInformationFile") );

	NtQueryInformationProcess = (PNtQueryInformationProcess)
		GetProcAddress(	GetModuleHandle( _T( "ntdll.dll" ) ),
                    _T("NtQueryInformationProcess") );

	return  NtQuerySystemInformation	!= NULL &&
			NtQueryObject				!= NULL &&
			NtQueryInformationThread	!= NULL &&
			NtQueryInformationFile		!= NULL &&
			NtQueryInformationProcess	!= NULL;
}

///////////////////////////////////////////////////////////////////////////////
//
// SystemProcessInformation
//
///////////////////////////////////////////////////////////////////////////////

SystemProcessInformation::SystemProcessInformation( BOOL bRefresh )
{
	m_pBuffer = (UCHAR*)VirtualAlloc ((void*)0x100000,
						BufferSize, 
						MEM_COMMIT,
						PAGE_READWRITE);

	if ( bRefresh )
		Refresh();
}

SystemProcessInformation::~SystemProcessInformation()
{
	VirtualFree( m_pBuffer, 0, MEM_RELEASE );
}

BOOL SystemProcessInformation::Refresh()
{
	m_ProcessInfos.clear();
	m_pCurrentProcessInfo = NULL;

	if ( !NtDllStatus || m_pBuffer == NULL )
		return FALSE;
	
	// query the process information
	if ( INtDll::NtQuerySystemInformation( 5, m_pBuffer, BufferSize, NULL )
			!= 0 )
		return FALSE;

	DWORD currentProcessID = GetCurrentProcessId(); //Current Process ID

	SYSTEM_PROCESS_INFORMATION* pSysProcess =
		(SYSTEM_PROCESS_INFORMATION*)m_pBuffer;
	do 
	{
		// fill the process information map
		m_ProcessInfos[pSysProcess->dUniqueProcessId] = pSysProcess;

		// we found this process
		if ( pSysProcess->dUniqueProcessId == currentProcessID )
			m_pCurrentProcessInfo = pSysProcess;

		// get the next process information block
		if ( pSysProcess->dNext != 0 )
			pSysProcess = (SYSTEM_PROCESS_INFORMATION*)
				((UCHAR*)pSysProcess + pSysProcess->dNext);
		else
			pSysProcess = NULL;

	} while ( pSysProcess != NULL );

	return TRUE;
}

///////////////////////////////////////////////////////////////////////////////
//
// SystemThreadInformation
//
///////////////////////////////////////////////////////////////////////////////

SystemThreadInformation::SystemThreadInformation( DWORD pID, BOOL bRefresh )
{
	m_processId = pID;

	if ( bRefresh )
		Refresh();
}

BOOL SystemThreadInformation::Refresh()
{
	// Get the Thread objects ( set the filter to "Thread" )
	SystemHandleInformation hi( m_processId );
	BOOL rc = hi.SetFilter( _T("Thread"), TRUE );

	m_ThreadInfos.clear();

	if ( !rc )
		return FALSE;

	THREAD_INFORMATION ti;

	// Iterating through the found Thread objects
	for (list<SystemHandleInformation::SYSTEM_HANDLE>::iterator iter = hi.m_HandleInfos.begin(); iter != hi.m_HandleInfos.end(); iter++) {
		SystemHandleInformation::SYSTEM_HANDLE& h = *iter;
		
		ti.ProcessId = h.ProcessID;
		ti.ThreadHandle = (HANDLE)h.HandleNumber;
		
		// This is one of the threads we are lokking for
		if ( SystemHandleInformation::GetThreadId( ti.ThreadHandle,
					ti.ThreadId, ti.ProcessId ) )
			m_ThreadInfos.push_back( ti );
	}

	return TRUE;
}

///////////////////////////////////////////////////////////////////////////////
//
// SystemHandleInformation
//
///////////////////////////////////////////////////////////////////////////////

SystemHandleInformation::SystemHandleInformation( DWORD pID, BOOL bRefresh,
		LPCTSTR lpTypeFilter )
{
	m_processId = pID;
	
	// Set the filter
	SetFilter( lpTypeFilter, bRefresh );
}

SystemHandleInformation::~SystemHandleInformation()
{
}

BOOL SystemHandleInformation::SetFilter( LPCTSTR lpTypeFilter, BOOL bRefresh )
{
	// Set the filter ( default = all objects )
	m_strTypeFilter = lpTypeFilter == NULL ? _T("") : lpTypeFilter;

	return bRefresh ? Refresh() : TRUE;
}

const string& SystemHandleInformation::GetFilter()
{
	return m_strTypeFilter;
}

BOOL SystemHandleInformation::IsSupportedHandle( SYSTEM_HANDLE& handle )
{
	//Here you can filter the handles you don't want in the Handle list

	// Windows 2000 supports everything :)
	if ( dwNTMajorVersion >= 5 )
		return TRUE;

	//NT4 System process doesn't like if we bother his internal security :)
	if ( handle.ProcessID == 2 && handle.HandleType == 16 )
		return FALSE;

	return TRUE;
}

BOOL SystemHandleInformation::Refresh()
{
	DWORD size = 0x2000;
	DWORD needed = 0;
	DWORD i = 0;
	BOOL  ret = TRUE;
	string strType;

	m_HandleInfos.clear();

	if ( !INtDll::NtDllStatus )
		return FALSE;

	// Allocate the memory for the buffer
	SYSTEM_HANDLE_INFORMATION* pSysHandleInformation =
		(SYSTEM_HANDLE_INFORMATION*)
		VirtualAlloc( NULL, size, MEM_COMMIT, PAGE_READWRITE );

	if ( pSysHandleInformation == NULL )
		return FALSE;

	// Query the needed buffer size for the objects ( system wide )
	if ( INtDll::NtQuerySystemInformation( 16, pSysHandleInformation,
				size, &needed ) != 0 )
	{
		if ( needed == 0 )
		{
			ret = FALSE;
			goto cleanup;
		}

		// The size was not enough
		VirtualFree( pSysHandleInformation, 0, MEM_RELEASE );

		pSysHandleInformation = (SYSTEM_HANDLE_INFORMATION*)
			VirtualAlloc( NULL, size = needed + 256,
					MEM_COMMIT, PAGE_READWRITE );
	}
	
	if ( pSysHandleInformation == NULL )
		return FALSE;

	// Query the objects ( system wide )
	if ( INtDll::NtQuerySystemInformation( 16, pSysHandleInformation,
				size, NULL ) != 0 )
	{
		ret = FALSE;
		goto cleanup;
	}
	
	// Iterating through the objects
	for ( i = 0; i < pSysHandleInformation->Count; i++ )
	{
		if ( !IsSupportedHandle( pSysHandleInformation->Handles[i] ) )
			continue;
		
		// ProcessId filtering check
		if ( pSysHandleInformation->Handles[i].ProcessID ==
				m_processId || m_processId == (DWORD)-1 ) {
			BOOL bAdd = FALSE;
			
			if ( m_strTypeFilter == _T("") )
				bAdd = TRUE;
			else
			{
				// Type filtering
				GetTypeToken( (HANDLE)pSysHandleInformation
						->Handles[i].HandleNumber,
						strType,
						pSysHandleInformation
						->Handles[i].ProcessID  );

				bAdd = strType == m_strTypeFilter;
			}

			// That's it. We found one.
			if ( bAdd )
			{	
				pSysHandleInformation->Handles[i].HandleType =
					(WORD)(pSysHandleInformation
					       ->Handles[i].HandleType % 256);
				
				m_HandleInfos.push_back( pSysHandleInformation
						->Handles[i] );

			}
		}
	}

cleanup:
	
	if ( pSysHandleInformation != NULL )
		VirtualFree( pSysHandleInformation, 0, MEM_RELEASE );

	return ret;
}

HANDLE SystemHandleInformation::OpenProcess( DWORD processId )
{
	// Open the process for handle duplication
	return ::OpenProcess( PROCESS_DUP_HANDLE, TRUE, processId );
}

HANDLE SystemHandleInformation::DuplicateHandle( HANDLE hProcess,
		HANDLE hRemote )
{
	HANDLE hDup = NULL;

	// Duplicate the remote handle for our process
	::DuplicateHandle( hProcess, hRemote,	GetCurrentProcess(), &hDup,
			0, FALSE, DUPLICATE_SAME_ACCESS );

	return hDup;
}

//Information functions
BOOL SystemHandleInformation::GetTypeToken( HANDLE h, string& str,
		DWORD processId )
{
	ULONG size = 0x2000;
	UCHAR* lpBuffer = NULL;
	BOOL ret = FALSE;

	HANDLE handle;
	HANDLE hRemoteProcess = NULL;
	BOOL remote = processId != GetCurrentProcessId();
	
	if ( !NtDllStatus )
		return FALSE;

	if ( remote )
	{
		// Open the remote process
		hRemoteProcess = OpenProcess( processId );
		
		if ( hRemoteProcess == NULL )
			return FALSE;

		// Duplicate the handle
		handle = DuplicateHandle( hRemoteProcess, h );
	}
	else
		handle = h;

	// Query the info size
	INtDll::NtQueryObject( handle, 2, NULL, 0, &size );

	lpBuffer = new UCHAR[size];

	// Query the info size ( type )
	if ( INtDll::NtQueryObject( handle, 2, lpBuffer, size, NULL ) == 0 )
	{
		str = _T("");
		SystemInfoUtils::LPCWSTR2string( (LPCWSTR)(lpBuffer+0x60),
				str );

		ret = TRUE;
	}

	if ( remote )
	{
		if ( hRemoteProcess != NULL )
			CloseHandle( hRemoteProcess );

		if ( handle != NULL )
			CloseHandle( handle );
	}
	
	if ( lpBuffer != NULL )
		delete [] lpBuffer;

	return ret;
}

BOOL SystemHandleInformation::GetType( HANDLE h, WORD& type, DWORD processId )
{
	string strType;

	type = OB_TYPE_UNKNOWN;

	if ( !GetTypeToken( h, strType, processId ) )
		return FALSE;

	return GetTypeFromTypeToken( strType.c_str(), type );
}

BOOL SystemHandleInformation::GetTypeFromTypeToken( LPCTSTR typeToken,
		WORD& type )
{
	const WORD count = 27;
	string constStrTypes[count] = { 
		_T(""), _T(""), _T("Directory"), _T("SymbolicLink"),
		_T("Token"), _T("Process"), _T("Thread"), _T("Unknown7"),
		_T("Event"), _T("EventPair"), _T("Mutant"), _T("Unknown11"),
		_T("Semaphore"), _T("Timer"), _T("Profile"),
		_T("WindowStation"), _T("Desktop"), _T("Section"), _T("Key"),
		_T("Port"), _T("WaitablePort"), _T("Unknown21"),
		_T("Unknown22"), _T("Unknown23"), _T("Unknown24"),
		_T("IoCompletion"), _T("File") };

	type = OB_TYPE_UNKNOWN;

	for ( WORD i = 1; i < count; i++ )
		if ( constStrTypes[i] == typeToken )
		{
			type = i;
			return TRUE;
		}
		
	return FALSE;
}

BOOL SystemHandleInformation::GetName( HANDLE handle, string& str, DWORD processId )
{
	WORD type = 0;

	if ( !GetType( handle, type, processId  ) )
		return FALSE;

	return GetNameByType( handle, type, str, processId );
}

BOOL SystemHandleInformation::GetNameByType( HANDLE h, WORD type, string& str, DWORD processId )
{
	ULONG size = 0x2000;
	UCHAR* lpBuffer = NULL;
	BOOL ret = FALSE;

	HANDLE handle;
	HANDLE hRemoteProcess = NULL;
	BOOL remote = processId != GetCurrentProcessId();
	DWORD dwId = 0;
	
	if ( !NtDllStatus )
		return FALSE;

	if ( remote )
	{
		hRemoteProcess = OpenProcess( processId );
		
		if ( hRemoteProcess == NULL )
			return FALSE;

		handle = DuplicateHandle( hRemoteProcess, h );
	}
	else
		handle = h;

	stringstream hex;
	// let's be happy, handle is in our process space, so query the infos :)
	switch( type )
	{
	case OB_TYPE_PROCESS:
		GetProcessId( handle, dwId );

		hex << "PID: 0x" << std::hex << dwId;
		str = hex.str();
			
		ret = TRUE;
		goto cleanup;
		break;

	case OB_TYPE_THREAD:
		GetThreadId( handle, dwId );

		hex << "TID: 0x" << std::hex << dwId;
				
		ret = TRUE;
		goto cleanup;
		break;

	case OB_TYPE_FILE:
		ret = GetFileName( handle, str );

		// access denied :(
		if ( ret && str == _T("") )
			goto cleanup;
		break;

	};

	INtDll::NtQueryObject ( handle, 1, NULL, 0, &size );

	// let's try to use the default
	if ( size == 0 )
		size = 0x2000;

	lpBuffer = new UCHAR[size];

	if ( INtDll::NtQueryObject( handle, 1, lpBuffer, size, NULL ) == 0 )
	{
		SystemInfoUtils::Unicode2string( (UNICODE_STRING*)lpBuffer, str );
		ret = TRUE;
	}
	
cleanup:

	if ( remote )
	{
		if ( hRemoteProcess != NULL )
			CloseHandle( hRemoteProcess );

		if ( handle != NULL )
			CloseHandle( handle );
	}

	if ( lpBuffer != NULL )
		delete [] lpBuffer;
	
	return ret;
}

//Thread related functions
BOOL SystemHandleInformation::GetThreadId( HANDLE h, DWORD& threadID, DWORD processId )
{
	SystemThreadInformation::BASIC_THREAD_INFORMATION ti;
	HANDLE handle;
	HANDLE hRemoteProcess = NULL;
	BOOL remote = processId != GetCurrentProcessId();
	
	if ( !NtDllStatus )
		return FALSE;

	if ( remote )
	{
		// Open process
		hRemoteProcess = OpenProcess( processId );
		
		if ( hRemoteProcess == NULL )
			return FALSE;

		// Duplicate handle
		handle = DuplicateHandle( hRemoteProcess, h );
	}
	else
		handle = h;
	
	// Get the thread information
	if ( INtDll::NtQueryInformationThread( handle, 0, &ti, sizeof(ti), NULL ) == 0 )
		threadID = ti.ThreadId;

	if ( remote )
	{
		if ( hRemoteProcess != NULL )
			CloseHandle( hRemoteProcess );

		if ( handle != NULL )
			CloseHandle( handle );
	}

	return TRUE;
}

//Process related functions
BOOL SystemHandleInformation::GetProcessPath( HANDLE h, string& strPath, DWORD remoteProcessId )
{
	h; strPath; remoteProcessId;

	stringstream number;
	number << remoteProcessId;
	strPath = number.str();

	return TRUE;
}

BOOL SystemHandleInformation::GetProcessId( HANDLE h, DWORD& processId, DWORD remoteProcessId )
{
	BOOL ret = FALSE;
	HANDLE handle;
	HANDLE hRemoteProcess = NULL;
	BOOL remote = remoteProcessId != GetCurrentProcessId();
	SystemProcessInformation::PROCESS_BASIC_INFORMATION pi;
	
	ZeroMemory( &pi, sizeof(pi) );
	processId = 0;
	
	if ( !NtDllStatus )
		return FALSE;

	if ( remote )
	{
		// Open process
		hRemoteProcess = OpenProcess( remoteProcessId );
		
		if ( hRemoteProcess == NULL )
			return FALSE;

		// Duplicate handle
		handle = DuplicateHandle( hRemoteProcess, h );
	}
	else
		handle = h;

	// Get the process information
	if ( INtDll::NtQueryInformationProcess( handle, 0, &pi, sizeof(pi), NULL) == 0 )
	{
		processId = pi.UniqueProcessId;
		ret = TRUE;
	}

	if ( remote )
	{
		if ( hRemoteProcess != NULL )
			CloseHandle( hRemoteProcess );

		if ( handle != NULL )
			CloseHandle( handle );
	}

	return ret;
}

//File related functions
void SystemHandleInformation::GetFileNameThread( PVOID pParam )
{
	// This thread function for getting the filename
	// if access denied, we hang up in this function, 
	// so if it times out we just kill this thread
	GetFileNameThreadParam* p = (GetFileNameThreadParam*)pParam;

	UCHAR lpBuffer[0x1000];
	DWORD iob[2];
	
	p->rc = INtDll::NtQueryInformationFile( p->hFile, iob, lpBuffer, sizeof(lpBuffer), 9 );

	if ( p->rc == 0 )
		*p->pName = (const char *)lpBuffer;
}

BOOL SystemHandleInformation::GetFileName( HANDLE h, string& str, DWORD processId )
{
	BOOL ret= FALSE;
	HANDLE hThread = NULL;
	GetFileNameThreadParam tp;
	HANDLE handle;
	HANDLE hRemoteProcess = NULL;
	BOOL remote = processId != GetCurrentProcessId();
	
	if ( !NtDllStatus )
		return FALSE;

	if ( remote )
	{
		// Open process
		hRemoteProcess = OpenProcess( processId );
		
		if ( hRemoteProcess == NULL )
			return FALSE;

		// Duplicate handle
		handle = DuplicateHandle( hRemoteProcess, h );
	}
	else
		handle = h;

	tp.hFile = handle;
	tp.pName = &str;
	tp.rc = 0;

	// Let's start the thread to get the file name
	hThread = (HANDLE)_beginthread( GetFileNameThread, 0, &tp );

	if ( hThread == NULL )
	{
		ret = FALSE;
		goto cleanup;
	}

	// Wait for finishing the thread
	if ( WaitForSingleObject( hThread, 100 ) == WAIT_TIMEOUT )
	{	
		// Access denied
		// Terminate the thread
		TerminateThread( hThread, 0 );

		str = _T("");

		ret = TRUE;
	}
	else
		ret = ( tp.rc == 0 );

cleanup:

	if ( remote )
	{
		if ( hRemoteProcess != NULL )
			CloseHandle( hRemoteProcess );

		if ( handle != NULL )
			CloseHandle( handle );
	}
		
	return ret;
}

//////////////////////////////////////////////////////////////////////////////////////
//
// SystemModuleInformation
//
//////////////////////////////////////////////////////////////////////////////////////

SystemModuleInformation::SystemModuleInformation( DWORD pID, BOOL bRefresh )
{
	m_processId = pID;

	if ( bRefresh )
		Refresh();
}

void SystemModuleInformation::GetModuleListForProcess( DWORD processID )
{
	DWORD i = 0;
	DWORD cbNeeded = 0;
	HMODULE* hModules = NULL;
	MODULE_INFO moduleInfo;

	// Open process to read to query the module list
	HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processID );

	if ( hProcess == NULL )
		goto cleanup;

	//Get the number of modules
	if ( !(*m_EnumProcessModules)( hProcess, NULL, 0, &cbNeeded ) )
		goto cleanup;

	hModules = new HMODULE[ cbNeeded / sizeof( HMODULE ) ];

	//Get module handles
    if ( !(*m_EnumProcessModules)( hProcess, hModules, cbNeeded, &cbNeeded ) )
		goto cleanup;
	
	for ( i = 0; i < cbNeeded / sizeof( HMODULE ); i++ )
	{
		moduleInfo.ProcessId = processID;
		moduleInfo.Handle = hModules[i];
		
		//Get module full paths
		if ( (*m_GetModuleFileNameEx)( hProcess, hModules[i], moduleInfo.FullPath, _MAX_PATH ) )
			m_ModuleInfos.push_back( moduleInfo );
	}

cleanup:
	if ( hModules != NULL )
		delete [] hModules;

	if ( hProcess != NULL )
		CloseHandle( hProcess );
}

BOOL SystemModuleInformation::Refresh()
{
	BOOL rc = FALSE;
	m_EnumProcessModules = NULL;
	m_GetModuleFileNameEx = NULL;

	m_ModuleInfos.clear();
	
	//Load Psapi.dll
	HINSTANCE hDll = LoadLibrary( "PSAPI.DLL" );
 
	if ( hDll == NULL )
	{
		rc = FALSE;
		goto cleanup;
	}

	//Get Psapi.dll functions
	m_EnumProcessModules = (PEnumProcessModules)GetProcAddress( hDll, "EnumProcessModules" );

	m_GetModuleFileNameEx = (PGetModuleFileNameEx)GetProcAddress( hDll, 
#ifdef UNICODE
								"GetModuleFileNameExW" );
#else
								"GetModuleFileNameExA" );
#endif

	if ( m_GetModuleFileNameEx == NULL || m_EnumProcessModules == NULL )
	{
		rc = FALSE;
		goto cleanup;
	}
	
	// Everey process or just a particular one
	if ( m_processId != -1 )
		// For a particular one
		GetModuleListForProcess( m_processId );
	else
	{
		// Get teh process list
		DWORD pID;
		SystemProcessInformation::SYSTEM_PROCESS_INFORMATION* p = NULL;
		SystemProcessInformation pi( TRUE );
		
		if ( pi.m_ProcessInfos.empty() )
		{
			rc = FALSE;
			goto cleanup;
		}

		// Iterating through the processes and get the module list
		for (map<DWORD, SystemProcessInformation::SYSTEM_PROCESS_INFORMATION *>::iterator iter = pi.m_ProcessInfos.begin(); iter != pi.m_ProcessInfos.end(); iter++) {
			pID = iter->first;
			p = iter->second;
			GetModuleListForProcess( pID );
		}
	}
	
	rc = TRUE;

cleanup:

	//Free psapi.dll
	if ( hDll != NULL )
		FreeLibrary( hDll );

	return rc;
}

//////////////////////////////////////////////////////////////////////////////////////
//
// SystemWindowInformation
//
//////////////////////////////////////////////////////////////////////////////////////

SystemWindowInformation::SystemWindowInformation( DWORD pID, BOOL bRefresh )
{
	m_processId = pID;

	if ( bRefresh )
		Refresh();
}

BOOL SystemWindowInformation::Refresh()
{
	m_WindowInfos.clear();

	// Enumerating the windows
	EnumWindows( EnumerateWindows, (LPARAM)this );
	
	return TRUE;
}

BOOL CALLBACK SystemWindowInformation::EnumerateWindows( HWND hwnd, LPARAM lParam )
{
	SystemWindowInformation* _this = (SystemWindowInformation*)lParam;
	WINDOW_INFO wi;

	wi.hWnd = hwnd;
	GetWindowThreadProcessId(hwnd, &wi.ProcessId ) ;

	// Filtering by process ID
	if ( _this->m_processId == -1 || _this->m_processId == wi.ProcessId )
	{
		GetWindowText( hwnd, wi.Caption, MaxCaptionSize );

		// That is we are looking for
		if ( GetLastError() == 0 )
			_this->m_WindowInfos.push_back( wi );
	}

	return TRUE;
};