问Pyhook event.Injected？

EN

import pythoncom, pyHook

def OnKeyboardEvent(event):
    print 'MessageName:',event.MessageName
    print 'Message:',event.Message
    print 'Time:',event.Time
    print 'Window:',event.Window
    print 'WindowName:',event.WindowName
    print 'Ascii:', event.Ascii, chr(event.Ascii)
    print 'Key:', event.Key
    print 'KeyID:', event.KeyID
    print 'ScanCode:', event.ScanCode
    print 'Extended:', event.Extended
    print 'Injected:', event.Injected
    print 'Alt', event.Alt
    print 'Transition', event.Transition
    print '---'

    # return True to pass the event to other handlers
    return True

# create a hook manager
hm = pyHook.HookManager()

# watch for key press events
hm.KeyDown = OnKeyboardEvent

# set the hook
hm.HookKeyboard()

# wait forever
pythoncom.PumpMessages()

import pythoncom, pyHook

def OnKeyboardEvent(event):
    # ... same code as in previous sample ...

# create a hook manager
hm = pyHook.HookManager()

# watch for key press events
hm.KeyDown = OnKeyboardEvent

# set the hook
hm.HookKeyboard()

# send keyboard event programmatically
msg = ...       # a value like in the "Message: ..." output in the previous run
vk_code = ...   # a value like in the "KeyID: ..." output in the previous run
scan_code = ... # a value like in the "ScanCode: ..." output in the previous run
ascii = ...     # a value like in the "Ascii: ..." output in the previous run
flags = 0x10    # see http://pyhook.sourceforge.net/doc_1.5.0/pyhook.HookManager-pysrc.html#KeyboardEvent.IsInjected
time = ...      # a value like in the "Time: ..." output in the previous run
hwnd = ...      # a value like in the "Window: ..." output in the previous run
win_name = ...  # a value like in the "WindowName: ..." output in the previous run
hm.KeyboardSwitch(msg, vk_code, scan_code, ascii, flags, time, hwnd, win_name)