python之win32下，枚举进程，线程和线程对应的窗口的利用ctypes实现

import ctypes
import win32com.client
import win32gui, win32api, pywintypes

WMI = win32com.client.GetObject('winmgmts:')
kernel32 = ctypes.windll.kernel32

TH32CS_SNAPTHREAD = 0x00000004

class THREADENTRY32(ctypes.Structure): 
    _fields_ = [
              ("dwSize", ctypes.c_ulong), 
              ("cntUsage", ctypes.c_ulong), 
              ("th32ThreadID", ctypes.c_ulong), 
              ("th32OwnerProcessID", ctypes.c_ulong), 
              ("tpBasePri", ctypes.c_long), 
              ("tpDeltaPri", ctypes.c_long), 
              ("dwFlags", ctypes.c_ulong)] 
    

def EnumerateThreads(processId):
    threadEntry = THREADENTRY32()
    
    threadList = []
    threadSnap = kernel32.CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, processId)
    if threadSnap is not None:
        threadEntry.dwSize = ctypes.sizeof(threadEntry)
        success = kernel32.Thread32First(threadSnap, ctypes.byref(threadEntry))
        if not success:
            print 'Failed getting first process.'
        
        while success:
            if threadEntry.th32OwnerProcessID == processId:
                threadList.append(threadEntry.th32ThreadID)
            success = kernel32.Thread32Next(threadSnap, ctypes.byref(threadEntry))
        
        kernel32.CloseHandle(threadSnap)
    return threadList

def EnumerateProcesses(processName):
    processList = WMI.ExecQuery("SELECT * FROM Win32_Process where name = '%s'"%processName)
    return processList


def SearchWindowHandleIdIdByCaption(processName ,caption):
    processList = EnumerateProcesses(processName)
    for process in processList:
        for thread in EnumerateThreads(long(process.Handle)):
            windows = []
            win32gui.EnumThreadWindows(thread, lambda hwnd, resultList: resultList.append(hwnd), windows)
            for windowIdi in windows:
                text = win32gui.GetWindowText(windowIdi) 
                text = text.__str__()
                caption = caption.__str__()
                if caption in text:
                    return [windowIdi, process.Handle]
    return [None, None]