import win32pdh

def get_processes():

    win32pdh.EnumObjects(None, None, win32pdh.PERF_DETAIL_WIZARD)

    #instances  是所有的进程名称

    junk, instances = win32pdh.EnumObjectItems(None,None,'Process', win32pdh.PERF_DETAIL_WIZARD)

    proc_dict = {}

    #建立进程状态字典并更新进程状态

    for instance in instances:

        if proc_dict.has_key(instance):

            proc_dict[instance] = proc_dict[instance] + 1

        else:

            proc_dict[instance]=0

    proc_ids = []

    for instance, max_instances in proc_dict.items():

        for inum in xrange(max_instances+1):

            hq = win32pdh.OpenQuery() # initializes the query handle

            print hq

            try:

                #查找出进程句柄位置

                path = win32pdh.MakeCounterPath( (None, 'Process', instance, None, inum, 'ID Process') )

                counter_handle=win32pdh.AddCounter(hq, path) #convert counter path to counter handle

                info = win32pdh.GetCounterInfo(counter_handle,3)

                print info

                try:

                    win32pdh.CollectQueryData(hq) #collects data for the counter

                    #val为进程id

                    type, val = win32pdh.GetFormattedCounterValue(counter_handle, win32pdh.PDH_FMT_LONG)

                    print val

                    proc_ids.append((instance, val))

                except win32pdh.error, e:

                    print e

                    pass

                win32pdh.RemoveCounter(counter_handle)

            except win32pdh.error, e:

                print e

                pass

            win32pdh.CloseQuery(hq) 

    return proc_ids