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20276701
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0
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2013-11-29T00:35:50.153
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2016-04-02T23:41:05.010
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2016-04-02T23:41:05.010
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<h2>Original Answer</h2> <p>Use <code>EnumWindows</code> and enumerate through all the windows, using <code>GetWindowText</code> to get each window's text, then filter it however you want.</p> <pre><code>[DllImport("user32.dll", CharSet = CharSet.Unicode)] private static extern int GetWindowText(IntPtr hWnd, StringBuilder strText, int maxCount); [DllImport("user32.dll", CharSet = CharSet.Unicode)] private static extern int GetWindowTextLength(IntPtr hWnd); [DllImport("user32.dll")] private static extern bool EnumWindows(EnumWindowsProc enumProc, IntPtr lParam); // Delegate to filter which windows to include public delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam); /// <summary> Get the text for the window pointed to by hWnd </summary> public static string GetWindowText(IntPtr hWnd) { int size = GetWindowTextLength(hWnd); if (size > 0) { var builder = new StringBuilder(size + 1); GetWindowText(hWnd, builder, builder.Capacity); return builder.ToString(); } return String.Empty; } /// <summary> Find all windows that match the given filter </summary> /// <param name="filter"> A delegate that returns true for windows /// that should be returned and false for windows that should /// not be returned </param> public static IEnumerable<IntPtr> FindWindows(EnumWindowsProc filter) { IntPtr found = IntPtr.Zero; List<IntPtr> windows = new List<IntPtr>(); EnumWindows(delegate(IntPtr wnd, IntPtr param) { if (filter(wnd, param)) { // only add the windows that pass the filter windows.Add(wnd); } // but return true here so that we iterate all windows return true; }, IntPtr.Zero); return windows; } /// <summary> Find all windows that contain the given title text </summary> /// <param name="titleText"> The text that the window title must contain. </param> public static IEnumerable<IntPtr> FindWindowsWithText(string titleText) { return FindWindows(delegate(IntPtr wnd, IntPtr param) { return GetWindowText(wnd).Contains(titleText); }); } </code></pre> <p>For example, to get all of the windows with "Notepad" in the title:</p> <pre><code>var windows = FindWindowsWithText("Notepad"); </code></pre> <h2>Win32Interop.WinHandles</h2> <p>This answer proved popular enough that I created an OSS project, <a href="https://github.com/zastrowm/Win32Interop.WinHandles" rel="noreferrer">Win32Interop.WinHandles</a> to provide an abstraction over IntPtrs for win32 windows. Using the library, to get all of the windows that contains "Notepad" in the title:</p> <pre><code>var allNotepadWindows = TopLevelWindowUtils.FindWindows(wh => wh.GetWindowText().Contains("Notepad")); </code></pre>
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1. POHow can I use EnumWindows to find windows with a specific caption/title?
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