C# Windows Forms: Set form Visibility Based on Focus enabled of external window

Posted by zion on Stack Overflow See other posts from Stack Overflow or by zion
Published on 2009-09-21T14:33:26Z Indexed on 2010/04/09 20:23 UTC
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I would like to create a Windows Forms application that when run is only visible once another external window (notepad.exe) is enabled/focused. Any hints, I don't know where to begin.

If my form is running I would like it to popup when Notepad is enabled and disappear when Notepad loses focus.

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