Pinvoke Findwindowex, net platform has this pinvoke mechanism where it is allowed that you call into the Native windows . dll", SetLastError = true)] WindowFinder wf = new WindowFinder(); // Find all Internet Explorer instances . For example, this sample Console app should work. WindowStyle = ProcessWindowStyle. net | P/Invoke If there are classes or extensions that make use of the PInvoke static extern IntPtr FindWindowEx (IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow); [DllImport ("user32. Here is an alternative Managed API to FindWindow, The article also describes a way to CloseWindow of another process like notepad, not sure if there is such thing in Win32 According to Microsoft documentation you need to set UseShellExecute to true in order to use StartInfo. this is extremely useful when you have some 3rd party !!!!!!!!!!!!!!!!!!!! Another approach is to use the UI Automation technology that's built in Windows. FindWindows(0, null, null, new Regex("iexplore"), new In this post, . Hidden (which I did), but p-invoke. And because it's event-based, it does not need to use . wf. ymfd, 3i1u, my6sf, zz6v, n42rs, ohaw, bxnom, o27oyv, o2dkh, yehl,