当应用程序未处于焦点时响应事件
我在编写一个我想要始终处于活动状态的程序时遇到了困难。
我在 keydown 上编写了代码来执行某些操作，但是当 form1 最小化或在托盘中时 keydown 事件没有响应。即使应用程序未处于焦点状态，如何才能使应用程序响应键盘事件？
另外：
它的窗口应用程序，lang是c#.NET，
I am having trouble writing a program that I want to be active always.
I wrote code on keydown to do something, but when form1 is minimized or in tray keydown event does not response. How can I get my application to respond to keyboard events even when it is not in focus?
addition :
its window app , and lang is c#.NET ,
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如果我可以假设该程序适用于 Windows，那么您就不能这样做。一旦您的应用程序窗口关闭，它就不会引发 KeyUp/KeyDown。最接近您想要的是热键（一旦检测到特定键即可激活程序）或键盘挂钩（如果您希望概述每个按键）。
但是，您将使用什么取决于您正在考虑的具体场景。
If I can assume that this program is for Windows, you cannot do that. Once you application window is closed, it will not raise KeyUp/KeyDown. Nearest to what you want is either hotkeys (to activate program once specific key is detected) or keyboard hook (if you wish to have overview of every key press).
However, what you will use depends on which exact scenario were you thinking about.