多种键盘和低级别挂钩 [英] Multiple keyboards and low-level hooks

问题描述

我有一个系统，我有多个键盘和真正需要知道的击键来自哪个键盘。为了解释设定：

I have a system where I have multiple keyboards and really need to know which keyboard the key stroke is coming from. To explain the set up:

1. 我有一个正常的PC和USB键盘


2. 我有一些硬键外接VGA屏幕


3. 的硬键被映射为标准USB键盘，发送键盘codeS的数量有限（F1，F2，返回，+和 - ）

我有一个低级别挂钩（在C＃中，但实际上，呼吁Win32的功能），它能够处理，即使我的应用程序不集中输入。

I have a low-level hook (in C# but actually calling upon Win32 functionality) which is able to deal with the input even when my application is not focused.

的问题是，使用普通键盘时，一些映射键盘codeS中的由应用程序被在外部屏幕上驱动拾取。一个接外屏发送，用于确认键盘presses是VK_RETURN。除非我可以在它识别设备和过滤器，用户可以执行的行动，并确认他们的屏幕，即使不看的。

The problem is that when using the normal keyboard, some of the mapped key-codes at picked up by the application being driven on the external screen. One of the key-presses sent by the external screen and used for confirmation is VK_RETURN. Unless I can identify the "device" and filter upon it, the user could be performing actions and confirming them on a screen their not even looking at.

我怎么知道哪个键盘是负责该键盘preSS？

How do I know which keyboard was responsible for the key-press?

推荐答案

是我认错，我不好，学习新的东西每一天。

Yes I stand corrected, my bad, learning something new every day.

下面是我在弥补吧:)尝试：

Here's my attempt at making up for it :) :

• 注册您要使用原始输入（两个键盘）与:: RegisterRawInputDevices（）的设备。

• Register the devices you want to use for raw input (the two keyboards) with ::RegisterRawInputDevices().

您可以从GetRawInputDeviceList这些设备（）

You can get these devices from GetRawInputDeviceList()

您已经注册了设备后，你会开始得到WM_INPUT消息。

After you've registered your devices, you will start getting WM_INPUT messages.

在WM_INPUT消息的lParam中包含您可以用它来确定输入来自的键盘，再加上虚拟键code和消息的类型（WM_KEYDOWN，WM_KEYUP一个RAWKEYBOARD结构，.. 。）

The lParam of the WM_INPUT message contains a RAWKEYBOARD structure that you can use to determine the keyboard where the input came from, plus the virtual keycode and the type of message (WM_KEYDOWN, WM_KEYUP, ...)

所以，你可以设置从最后一个消息传来，其中一个标志，然后将其派遣到正规的键盘输入的处理程序。

So you can set a flag of where the last message came from and then dispatch it to the regular keyboard input handlers.

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