获取当前进程，并显示每个进程使用的模块

// processlist.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <windows.h>
#include <tlhelp32.h>
#include <stdio.h>

//  Forward declarations:
BOOL GetProcessList( );
BOOL ListProcessModules( DWORD dwPID );
BOOL ListProcessThreads( DWORD dwOwnerPID );
void printError( TCHAR* msg );

void main( )
{
GetProcessList( );
}

BOOL GetProcessList( )
{
HANDLE hProcessSnap;
HANDLE hProcess;
PROCESSENTRY32 pe32;
DWORD dwPriorityClass;

// Take a snapshot of all processes in the system.
hProcessSnap = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
if( hProcessSnap == INVALID_HANDLE_VALUE )
{
printError( "CreateToolhelp32Snapshot (of processes)" );
return( FALSE );
}

// Set the size of the structure before using it.
pe32.dwSize = sizeof( PROCESSENTRY32 );

// Retrieve information about the first process,
// and exit if unsuccessful
if( !Process32First( hProcessSnap, &pe32 ) )
{
printError( "Process32First" );  // Show cause of failure
CloseHandle( hProcessSnap );     // Must clean up the snapshot object!
return( FALSE );
}

// Now walk the snapshot of processes, and
// display information about each process in turn
do
{
printf( "\n\n=====================================================" );
printf( "\nPROCESS NAME:  %s", pe32.szExeFile );
printf( "\n-----------------------------------------------------" );

// Retrieve the priority class.
dwPriorityClass = 0;
hProcess = OpenProcess( PROCESS_ALL_ACCESS, FALSE, pe32.th32ProcessID );
if( hProcess == NULL )
printError( "OpenProcess" );
else
{
dwPriorityClass = GetPriorityClass( hProcess );
if( !dwPriorityClass )
printError( "GetPriorityClass" );
CloseHandle( hProcess );
}

printf( "\n  process ID        = 0x%08X", pe32.th32ProcessID );
printf( "\n  thread count      = %d",   pe32.cntThreads );
printf( "\n  parent process ID = 0x%08X", pe32.th32ParentProcessID );
printf( "\n  Priority Base     = %d", pe32.pcPriClassBase );
if( dwPriorityClass )
printf( "\n  Priority Class    = %d", dwPriorityClass );

// List the modules and threads associated with this process
ListProcessModules( pe32.th32ProcessID );
ListProcessThreads( pe32.th32ProcessID );

} while( Process32Next( hProcessSnap, &pe32 ) );

CloseHandle( hProcessSnap );
return( TRUE );
}

BOOL ListProcessModules( DWORD dwPID )
{
HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
MODULEENTRY32 me32;

// Take a snapshot of all modules in the specified process.
hModuleSnap = CreateToolhelp32Snapshot( TH32CS_SNAPMODULE, dwPID );
if( hModuleSnap == INVALID_HANDLE_VALUE )
{
printError( "CreateToolhelp32Snapshot (of modules)" );
return( FALSE );
}

// Set the size of the structure before using it.
me32.dwSize = sizeof( MODULEENTRY32 );

// Retrieve information about the first module,
// and exit if unsuccessful
if( !Module32First( hModuleSnap, &me32 ) )
{
printError( "Module32First" );  // Show cause of failure
CloseHandle( hModuleSnap );     // Must clean up the snapshot object!
return( FALSE );
}

// Now walk the module list of the process,
// and display information about each module
do
{
printf( "\n\n     MODULE NAME:     %s",             me32.szModule );
printf( "\n     executable     = %s",             me32.szExePath );
printf( "\n     process ID     = 0x%08X",         me32.th32ProcessID );
printf( "\n     ref count (g)  =     0x%04X",     me32.GlblcntUsage );
printf( "\n     ref count (p)  =     0x%04X",     me32.ProccntUsage );
printf( "\n     base address   = 0x%08X", (DWORD) me32.modBaseAddr );
printf( "\n     base size      = %d",             me32.modBaseSize );

} while( Module32Next( hModuleSnap, &me32 ) );

CloseHandle( hModuleSnap );
return( TRUE );
}

BOOL ListProcessThreads( DWORD dwOwnerPID )
{
HANDLE hThreadSnap = INVALID_HANDLE_VALUE;
THREADENTRY32 te32;

// Take a snapshot of all running threads
hThreadSnap = CreateToolhelp32Snapshot( TH32CS_SNAPTHREAD, 0 );
if( hThreadSnap == INVALID_HANDLE_VALUE )
return( FALSE );

// Fill in the size of the structure before using it.
te32.dwSize = sizeof(THREADENTRY32 );

// Retrieve information about the first thread,
// and exit if unsuccessful
if( !Thread32First( hThreadSnap, &te32 ) )
{
printError( "Thread32First" );  // Show cause of failure
CloseHandle( hThreadSnap );     // Must clean up the snapshot object!
return( FALSE );
}

// Now walk the thread list of the system,
// and display information about each thread
// associated with the specified process
do
{
if( te32.th32OwnerProcessID == dwOwnerPID )
{
printf( "\n\n     THREAD ID      = 0x%08X", te32.th32ThreadID );
printf( "\n     base priority  = %d", te32.tpBasePri );
printf( "\n     delta priority = %d", te32.tpDeltaPri );
}
} while( Thread32Next(hThreadSnap, &te32 ) );

CloseHandle( hThreadSnap );
return( TRUE );
}

void printError( TCHAR* msg )
{
DWORD eNum;
TCHAR sysMsg[256];
TCHAR* p;

eNum = GetLastError( );
FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, eNum,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
sysMsg, 256, NULL );

// Trim the end of the line and terminate it with a null
p = sysMsg;
while( ( *p > 31 ) || ( *p == 9 ) )
++p;
do { *p-- = 0; } while( ( p >= sysMsg ) &&
( ( *p == '.' ) || ( *p < 33 ) ) );

// Display the message
printf( "\n  WARNING: %s failed with error %d (%s)", msg, eNum, sysMsg );
}