如何在Windows PC上实现键盘自动重复功能? [英] How is keyboard auto-repeat implemented on a Windows PC?

问题描述

我希望能够在Windows上拦截自动重复按键(并对其进行任意处理).我想知道如何实现键盘自动重复功能，以便知道自己有哪些选择.即我可以在以下位置拦截吗?

I want to be able to intercept (and do arbitrary processing on) auto-repeating key presses on Windows. I'd like to know how keyboard auto-repeat is implemented so that I know what options I have. i.e. can I intercept at the:

• 应用程序，
• 设备驱动程序和/或
• 硬件级别

?

更新:看起来(硬件性能差)自动重复，然后被设备驱动程序覆盖(

Update: It looks like auto-repeat is (poorly?) generated at the hardware level and then overridden by device drivers (see here).

推荐答案

要修改或过滤行为，可以使用钩子来拦截键:

To modify or filter behavior, you can intercept keys using a hook:

SetWindowsHookEx 使用

SetWindowsHookEx using WH_KEYBOARD

挂钩过程在其中接收其他，重复计数(由于按住键)

The hook procedure receives, among others, the repeat count (due to holding down the key)

请注意，低级键盘挂钩(WH_KEYBOARD_LL)不接收重复计数.

Note that the low level keyboard hook (WH_KEYBOARD_LL) does not receive the repeat count.

如果所有窗口都在同一trhead中创建，则可以使用特定于线程的钩子，并避免将钩子过程移至DLL.

If all your windows are created in the same trhead, you can use a thread-specific hook, and avoid moving the hook procedure to a DLL.

我模糊地记得重复计数是由键盘本身产生的，并且LL挂钩会发送重复的击键事件-不过，我可能会误会.在DOS下，拔出并重新插入DIN或PS/2键盘后，在BIOS中或通过BIOS调用设置的键重复率和时间确实恢复为默认值.我不确定为什么您需要确切知道.

I dimly remember that repeat counts are generated by the keyboard itself and the LL hook sends repeated keydown events - I may be mistaken, though. Under DOS, the key repeat rate and time that was set in BIOS or through a BIOS call did return to default values when a DIN or PS/2 keyboard was unplugged and replugged. I am not sure WHY you need to know exactly.

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