检查其他应用程序是否具有焦点. [英] Check if other app has focus .

问题描述

我使用SendKeys api将按键发送到其他一些应用程序.当应用失去焦点时，我想停止此操作.是否可以检查其他应用程序是否具有焦点，或者更好地使应用程序不能失去焦点?在此先谢谢您.

I use SendKeys api to send keystokes to some other app. I want to stop this when app loses focus . Is there posibility to check if other app has focus or even better to make app can''t lose focus ? Thanks in advance.

推荐答案

要使窗口焦点，请使用Windows api函数setForgroundWindow.

有关MSDN的相关信息，请点击此处.

http://msdn.microsoft.com/en-us/library/ms633539％28v = vs.85％29.aspx [ ^ ]

To make a window focus use the windows api function setForgroundWindow.

MSDN decumentation about it here.

http://msdn.microsoft.com/en-us/library/ms633539%28v=vs.85%29.aspx[^]

对于表单，Form''s焦点"实际上是它的激活；您可以使用Form.Activate.如果这是某些非形式的Windows，则可以使用Albin的答案.要知道窗口是否在前台，您应该使用Windows API GetForegroundWindow，该API返回HWND并与相关窗口的HWND进行比较.您需要同时使用P/Invoke和SetForegroundWindow.

这将无法解决您的问题.有关完整分辨率，请参见以下两个答案:

应用程序焦点的得失 [在BACKSPACE按钮上编程 [

For forms, a Form''s "focus" is actually it''s activation; you can use Form.Activate. If this is some Windows which is not a form, you can use the Answer by Albin. To know if a Window is in foreground you should use Windows API GetForegroundWindow which returns HWND and compare with HWND of the Window in question. You need to use P/Invoke as well as for SetForegroundWindow.

This along will not solve your problem. For full resolution, please see these two Answers:

Application focus getting and losing[^]
Programming on BACKSPACE button[^]

—SA

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