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Asked: 2026-05-13T16:09:53+00:00

I want to have this feature in my C# program: When the user do

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I want to have this feature in my C# program: When the user do Ctrl + C or Copy anywhere (i.e. when the clipboard content changes), my program will get notified, and check whether the content met certain criteria, if so, become the active program, and process the content, etc.

I can get the contents out from System.Windows.Forms.Clipboard, however, I don’t know how to monitor the content changes from the clipboard.

If using Windows Vista or later, use AddClipboardFormatListener as in John Knoeller’s answer, for Windows XP, I have to use the older, more fragile SetClipboardViewer API, as in the accepted answer.

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1 Answer

  1. Editorial Team

    You could use SetClipboardViewer provided by Win32 API (through P/Invoke).

    Here is a page which contains code to set one up in C#: http://www.codeguru.com/csharp/.net/net_general/tipstricks/article.php/c7315/

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