使用什么SendMessage直接将密钥发送到另一个窗口? [英] what SendMessage to use to send keys directly to another window?

问题描述

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，但是我必须这样做，因为我必须发送几个键，而且我不能保证窗口将具有焦点-因此这必须在窗口没有焦点时起作用.

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.

我正在通过尝试将密钥发送到记事本窗口进行测试.我尝试了以下变体，但没有一个起作用:

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)

推荐答案

在我写问题时，我理解SendKeys是生成键盘输入的正确方法，并且这是在所有情况下均适用的唯一方法.但是，我不能使用SendKeys，因为在我的程序运行时会主动使用正在运行我的程序的计算机，这意味着可以随时单击鼠标，这将改变窗口的焦点并使SendKeys开始将输入发送到错误的窗口.

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 use SendKeys, 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 make SendKeys start sending input to the wrong window.

我想知道的是，为什么我的代码尤其无法正常工作-我在发送的消息类型上做错什么了吗? Post与Send? WPARAM应该是什么?等等...答案可能是因为我正在将消息发送到记事本"窗口，而不是发送到记事本"中找到的编辑控件-我怀疑这可以正常工作.

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 should WPARAM 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.

无论如何，我尝试将输入发送到我希望它可以实际运行的应用程序，并且最终成功了:

Anyway, I tried sending input to the app I wanted it to actually work on, and this ended up working:

def send_input_hax(hwnd, msg):
    for c in msg:
        if c == "\n":
            win32api.SendMessage(hwnd, win32con.WM_KEYDOWN, win32con.VK_RETURN, 0)
            win32api.SendMessage(hwnd, win32con.WM_KEYUP, win32con.VK_RETURN, 0)
        else:
            win32api.SendMessage(hwnd, win32con.WM_CHAR, ord(c), 0)

因此，答案是我没有在邮件类型或邮件内容方面做任何错，这只是到了错误的目的地.

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.

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