Browser tab title grabber

BrowserTitleGrabber.cs

/*
 * C# Browser Title Grabber by Jiiks
 * Grabs titles of all tabs.
 * Tested with Chrome and Firefox.
*/

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Windows.Automation;

namespace YourNameSpace {

    public static class BrowserTitleGrabber {

        public static readonly Condition TabControlCondition = new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Tab);
        public static readonly Condition TabItemCondition = new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.TabItem);
        
        private delegate bool EnumThreadDelegate(IntPtr hWnd, IntPtr lParam);
        [DllImport("user32.dll")]
        private static extern bool EnumThreadWindows(uint dwThreadId, EnumThreadDelegate lpfn, IntPtr lParam);

        public static IEnumerable<string> GetTabTitles(EBrowser browser) {
            switch (browser) {
                case EBrowser.Chrome:
                    return GetTabTitles("chrome");
                case EBrowser.Firefox:
                    return GetTabTitles("firefox");
                default:
                    throw new ArgumentOutOfRangeException(nameof(browser), browser, null);
            }
        }
        public static IEnumerable<string> GetTabTitles(string procName) {
            _cBt = new List<string>();
            foreach (var process in Process.GetProcessesByName(procName)) {
                foreach (ProcessThread processThread in process.Threads) {
                    EnumThreadWindows((uint) processThread.Id, EnumThreadWindowsCb, IntPtr.Zero);
                }
            }
            return _cBt;
        }
        
        private static List<string> _cBt;
        private static bool EnumThreadWindowsCb(IntPtr hWnd, IntPtr lParam) {
            try {
                _cBt.AddRange(GetTabTitles(hWnd));
            }
            catch (Exception) {
                // ignored
            }
            return true;
        }

        private static IEnumerable<string> GetTabTitles(IntPtr handle) {
            if (handle == IntPtr.Zero) return new List<string>();
            var rootElement = AutomationElement.FromHandle(handle);
            if(rootElement == null) return new List<string>();
            var tabControl = rootElement.FindFirst(TreeScope.Descendants, TabControlCondition);
            return tabControl == null ? new List<string>() : (from AutomationElement tab in tabControl.FindAll(TreeScope.Children, TabItemCondition) select tab.Current.Name).ToList();
        }

        public enum EBrowser  {
            Chrome,
            Firefox
        }
    }
}

Thanks very much for this very useful snippet.
Anyway I found an issue on Chrome.
Indeed if the chrome window is minimized, no tabs are returned.
To fix it, when the "tabControl" object isn't null, I check the Window state with "GetWindowPlacement" api.
If the window is minimized, then I invoke "ShowWindow(handle, 4)", before to continue...
In other words I show the window on last position ;)

epic

Seems not to be working anymore on latest chrome 109 😢

New solution:

using interop.UIAutomationCore;

public static List<string> GetTabs()
        {
            List<String> result = new List<string>();

            Process[] allChromeProcesses = Process.GetProcessesByName("chrome");

            if (allChromeProcesses.Length == 0)
                return result;

            Process[] mainChromes = allChromeProcesses.Where(p => !String.IsNullOrEmpty(p.MainWindowTitle)).ToArray();

            if (mainChromes.Length == 0)
                return result;

            var uiaClassObject = new CUIAutomation();

            for (int c = 0; c < mainChromes.Length; c++)
            {
                IUIAutomationElement chromeMainUIAElement = uiaClassObject.ElementFromHandle(mainChromes[c].MainWindowHandle);

                //UIA_ControlTypePropertyId =30003, UIA_TabItemControlTypeId = 50019
                IUIAutomationCondition chromeTabCondition = uiaClassObject.CreatePropertyCondition(30003, 50019);
                var chromeTabCollection = chromeMainUIAElement.FindAll(interop.UIAutomationCore.TreeScope.TreeScope_Descendants, chromeTabCondition);

                for (int i = 0; i < chromeTabCollection.Length; i++)
                {
                    //UIA_LegacyIAccessiblePatternId = 10018, 0 -> Number of Chrome tab you want to activate
                    var lp = chromeTabCollection.GetElement(i).GetCurrentPattern(10018) as IUIAutomationLegacyIAccessiblePattern;
                    //lp.DoDefaultAction(); // to activate tab

                    String tabTitle = lp.CurrentName;
                    result.Add(tabTitle);

                }
            }

            return result;
        }

To generate the interop, start a "Developer Command Prompt" and execute:
tlbimp C:\Windows\System32\UIAutomationCore.dll -out:interop.UIAutomationCore.dll