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.NET event for application will lose and gain focus

Is there an easy way to detect when a .NET application gains or loses focus?

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6 answers

The events you are looking for are Form.Activated and Form. Deactivated

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I was curious how this method would work under various conditions in an MDI application. It turns out that this will not work in all situations.

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, , / MDI, , ( ShowDialog).

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:

this.LostFocus


this.GotFocus

In the parent form / window itself

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For WPF, FocusChanged in the window. Winforms should have a similar event. You can find out using intellisense in Visual Studio.

Activated / deactivated seems to be standard though.

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In winforms he is Activated

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Handle the Control.GotFocus and Control.LostFocus events for the main window.

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Source: https://habr.com/ru/post/1709100/

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