Windows下获取进程信息的示例代码

介绍Windows平台下通过API函数获取进程相关信息的示例代码，展示了如何使用Windows API函数获取进程名称、PID等信息。

#include <windows.h>
#include <tlhelp32.h>
#include <tchar.h>

void ListProcessModules(DWORD dwPID)
{
    HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
    MODULEENTRY32 me32;
    hModuleSnap = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, dwPID);
    if (hModuleSnap == INVALID_HANDLE_VALUE)
    {
        _tprintf(_T("CreateToolhelp32Snapshot (of modules)"));
        return;
    }
    me32.dwSize = sizeof(MODULEENTRY32);
    if (!Module32First(hModuleSnap, &me32))
    {
        _tprintf(_T("Module32First"));  // Module32First failed
        CloseHandle(hModuleSnap);
        return;
    }
    do
    {
        _tprintf(_T("\n   MODULE NAME:     %s"), me32.szModule);
        _tprintf(_T("\n   Executable     : %s"), me32.szExePath);
        _tprintf(_T("\n   Process ID     : 0x%08X"), me32.th32ProcessID);
        _tprintf(_T("\n   Ref count (g)  :     0x%04X"), me32.GlblcntUsage);
        _tprintf(_T("\n   Ref count (p)  :     0x%04X"), me32.ProccntUsage);
        _tprintf(_T("\n   Base address   : %p"), me32.modBaseAddr);
        _tprintf(_T("\n   Base size      : %d"), me32.modBaseSize);
    } while (Module32Next(hModuleSnap, &me32));
    CloseHandle(hModuleSnap);
}

void ListProcess(DWORD dwProcessId)
{
    HANDLE hProcess;
    HANDLE hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    PROCESSENTRY32 pe32;
    if (INVALID_HANDLE_VALUE == hProcessSnap)
    {
        return;
    }
    pe32.dwSize = sizeof(PROCESSENTRY32);
    if (!Process32First(hProcessSnap, &pe32))
    {
        CloseHandle(hProcessSnap);
        return;
    }
    do
    {
        if (pe32.th32ProcessID == dwProcessId)
        {
            _tprintf(_T("\nPROCESS NAME:  %s"), pe32.szExeFile);
            _tprintf(_T("\nPID          :  0x%08X"), pe32.th32ProcessID);
            _tprintf(_T("\n"));
            ListProcessModules(dwProcessId);
        }
    } while (Process32Next(hProcessSnap, &pe32));
    CloseHandle(hProcessSnap);
}

int main(int argc, char* argv[])
{
    ListProcess(atoi(argv[1]));  // argv[1]为进程PID
    return 0;
}

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