使用什么 SendMessage 将密钥直接发送到另一个窗口?
我正在尝试使用 SendMessage
将键盘输入发送到另一个窗口。我知道缺点,但我必须这样做,因为我必须发送几个键,并且我不能保证窗口将具有焦点 - 所以当窗口没有焦点时,这必须起作用。
我正在通过尝试将密钥发送到记事本窗口来测试它。我尝试过以下变体,但没有一个有效:
def post_keys1(hwnd):
win32api.SendMessage(
hwnd, win32con.WM_KEYDOWN, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0 << 24))
win32api.SendMessage(
hwnd, win32con.WM_CHAR, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0 << 24))
win32api.SendMessage(
hwnd, win32con.WM_KEYUP, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0xC0 << 24))
def post_keys2(hwnd):
win32api.PostMessage(
hwnd, win32con.WM_KEYDOWN, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0 << 24))
win32api.PostMessage(
hwnd, win32con.WM_CHAR, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0 << 24))
win32api.PostMessage(
hwnd, win32con.WM_KEYUP, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0xC0 << 24))
def post_keys3(hwnd):
win32api.SendMessage(hwnd, win32con.WM_CHAR,
ord('A'), 0)
def post_keys4(hwnd):
win32api.PostMessage(hwnd, win32con.WM_CHAR,
ord('A'), 0)
def post_keys5(hwnd):
win32api.PostMessage(hwnd, win32con.WM_KEYDOWN, ord('A'), 0)
win32api.PostMessage(hwnd, win32con.WM_CHAR, ord('A'), 0)
win32api.PostMessage(hwnd, win32con.WM_KEYUP, ord('A'), 0)
def post_keys6(hwnd):
win32api.SendMessage(hwnd, win32con.WM_KEYDOWN, ord('A'), 0)
win32api.SendMessage(hwnd, win32con.WM_CHAR, ord('A'), 0)
win32api.SendMessage(hwnd, win32con.WM_KEYUP, ord('A'), 0)
I'm trying to use SendMessage
to send keyboard input to another window. I know the drawbacks, but I have to do it since I have to send several keys and I can't guarantee that the window will have focus - so this has to work when the window doesnt have focus.
I'm testing it by trying to send keys to a notepad window. I've tried the following variations, and none have worked:
def post_keys1(hwnd):
win32api.SendMessage(
hwnd, win32con.WM_KEYDOWN, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0 << 24))
win32api.SendMessage(
hwnd, win32con.WM_CHAR, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0 << 24))
win32api.SendMessage(
hwnd, win32con.WM_KEYUP, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0xC0 << 24))
def post_keys2(hwnd):
win32api.PostMessage(
hwnd, win32con.WM_KEYDOWN, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0 << 24))
win32api.PostMessage(
hwnd, win32con.WM_CHAR, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0 << 24))
win32api.PostMessage(
hwnd, win32con.WM_KEYUP, ord('A'),
0 + (0 << 8) + (ord('A') << 16) + (0xC0 << 24))
def post_keys3(hwnd):
win32api.SendMessage(hwnd, win32con.WM_CHAR,
ord('A'), 0)
def post_keys4(hwnd):
win32api.PostMessage(hwnd, win32con.WM_CHAR,
ord('A'), 0)
def post_keys5(hwnd):
win32api.PostMessage(hwnd, win32con.WM_KEYDOWN, ord('A'), 0)
win32api.PostMessage(hwnd, win32con.WM_CHAR, ord('A'), 0)
win32api.PostMessage(hwnd, win32con.WM_KEYUP, ord('A'), 0)
def post_keys6(hwnd):
win32api.SendMessage(hwnd, win32con.WM_KEYDOWN, ord('A'), 0)
win32api.SendMessage(hwnd, win32con.WM_CHAR, ord('A'), 0)
win32api.SendMessage(hwnd, win32con.WM_KEYUP, ord('A'), 0)
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当我写这个问题时,我明白
SendKeys
是生成键盘输入的正确方法,并且这是唯一在所有情况下都有效的方法。但是,我无法使用SendKeys
,因为我的程序运行所在的计算机将在我的程序运行时被主动使用,这意味着鼠标单击可能随时发生,从而改变程序的焦点窗口并使SendKeys
开始将输入发送到错误的窗口。我想知道的是为什么我的代码无法正常工作——我发送的消息类型是否有问题?
发布
与发送
?WPARAM
应该是什么?等等...答案可能是因为我将消息发送到记事本窗口,而不是发送到记事本内的编辑控件 - 我怀疑这会起作用。不管怎样,我尝试将输入发送到我希望它实际工作的应用程序,这最终成功了:
所以答案是,我在消息类型或消息内容方面没有做任何错误,它是只是到了一个错误的目的地。
When I wrote the question, I understood that
SendKeys
is the correct way to generate keyboard input, and that's the only one that works in all cases. However, I couldn't useSendKeys
, cause the computer my program is running on will be actively used while my program is running, meaning a mouse-click can happen at any time that will change the focus of the window and makeSendKeys
start sending input to the wrong window.What I wanted to know was just why in particular my code wasn't working - was I doing something wrong with the types of messages I was sending?
Post
vs.Send
? What shouldWPARAM
be? Etc... The answer was probably cause I was sending the messages to the Notepad window, and not to the edit control found inside Notepad - I suspect that will work.Anyway, I tried sending input to the app I wanted it to actually work on, and this ended up working:
So the answer is that I wasn't doing anything wrong in terms of the message types or the contents of the message, it was just to an incorrect destination.