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If there are multipple running applications, I need to get the most recently used. I know that I can find all running instances of my app using Process, but how to find from this list most recently used instance?

Mirzodaler Ataev
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2 Answers2

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Use Process.StartTime Property of Process class to know which instance started most recently.

Deepak Bhatia
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  • using StartTime I can find opened most recently, but how can I find used most recently? For example I started instance A, than started instance B, and than continue working on instance A. In this case instance A is most recently used, and instance B is most recently started. And I need to get instance A – Mirzodaler Ataev Aug 05 '15 at 05:47
  • In that case you can use Application.Activated Event (https://msdn.microsoft.com/en-us/library/system.windows.application.activated(v=vs.110).aspx) in your app and write some information (like process Id and time-stamp) at a common place. Then read that information in you watcher app to know which process was active recently. – Deepak Bhatia Aug 05 '15 at 15:18
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I found other solution using Z-Order window How to get the z-order in windows?

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Mirzodaler Ataev
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