Simple Solution to trigger TrayIcon through settings with UIA

TryIconSetter.cs

/*
 * App.cs
 * Copyright 2018 Raising the Floor - International
 *
 * Licensed under the New BSD license. You may not use this file except in
 * compliance with this License.
 *
 * The R&D leading to these results received funding from the
 * Department of Education - Grant H421A150005 (GPII-APCP). However,
 * these results do not necessarily represent the policy of the
 * Department of Education, and you should not assume endorsement by the
 * Federal Government.
 *
 * You may obtain a copy of the License at
 * https://github.com/GPII/universal/blob/master/LICENSE.txt
 */

using System;
using System.Threading;

using interop.UIAutomationCore;

namespace UIA_GPII_TaskBar_Icon
{
    class App
    {
        static void Main(string[] args)
        {
            System.Diagnostics.Process.Start("ms-settings:taskbar");  
            Console.WriteLine(":: Starting ms-settings.");

            Console.WriteLine(":: Initializing UI Automation.");
            // The first step in calling UIA, is getting a CUIAutomation object.
            var _automation = new CUIAutomation();

            // The properties are used from the actual constant values here:
            // "https://msdn.microsoft.com/en-us/library/windows/desktop/ee684017(v=vs.85)."
            int _propertyName = 30005;
            int _propertyAutomationId = 30011;
            int _propertyClassName = 30012;

            // The patterns are used from the actual constant values here:
            // "https://msdn.microsoft.com/en-us/library/windows/desktop/ee671195(v=vs.85).aspx"
            int _invokePattern = 10000;
            int _tooglePattern = 10015;

            // Application name to be showed as taskbar icon.
            string appToLock = "ApplicationName";

            Console.WriteLine(":: Getting root node.");
            // The first step in calling UIA, is getting a CUIAutomation object.
            var rootElement = _automation.GetRootElement();

            IUIAutomationCondition waitSettingsOpenning =
                _automation.CreatePropertyCondition(
                    _propertyAutomationId,
                    "SystemSettings_Taskbar_Lock_ToggleSwitch"
                );

            Console.WriteLine(":: Waiting for 'ms-settings' app to be ready.");
            var settingsOpennedMark = rootElement.FindFirst(TreeScope.TreeScope_Subtree, waitSettingsOpenning);
            while (settingsOpennedMark == null)
            {
                Thread.Sleep(2000);
                settingsOpennedMark = rootElement.FindFirst(TreeScope.TreeScope_Subtree, waitSettingsOpenning);
            }
            Console.WriteLine(":: 'ms-settings' app oppened sucessfully.");

            // Triggers the first link to the list of possible applications icons.
            // SystemSettings_Taskbar_SelectIconsToAppearOnTaskbar_HyperlinkButton

            IUIAutomationCondition searchTaskBarIconsLink =
                _automation.CreatePropertyCondition(
                    _propertyAutomationId,
                    "SystemSettings_Taskbar_SelectIconsToAppearOnTaskbar_HyperlinkButton"
                );

            Console.WriteLine(":: Openning 'ms-settings' app section with icon toogling.");
            IUIAutomationElement selectIconsLink = rootElement.FindFirst(TreeScope.TreeScope_Subtree, searchTaskBarIconsLink);
            if (selectIconsLink == null)
            {
                Console.WriteLine("Error: No link to icon section found.");
                return;
            }
            var invokeSelecIcons = (IUIAutomationInvokePattern)selectIconsLink.GetCurrentPattern(_invokePattern);
            invokeSelecIcons.Invoke();

            IUIAutomationCondition changedToSelectIconMode =
                _automation.CreatePropertyCondition(
                    _propertyAutomationId,
                    "SystemSettings_Notifications_ShowIconsOnTaskbar_ToggleSwitch"
                );

            Console.WriteLine(":: Waiting for 'ms-settings' to be in icon toggling section.");
            var markFound = rootElement.FindFirst(TreeScope.TreeScope_Subtree, changedToSelectIconMode);
            while (markFound == null)
            {
                Thread.Sleep(1000);
                markFound = rootElement.FindFirst(TreeScope.TreeScope_Subtree, changedToSelectIconMode);
            }

            IUIAutomationCondition searchGPIIAppInIconListName =
                _automation.CreatePropertyCondition(
                    _propertyName,
                    appToLock
                );

            IUIAutomationCondition searchGPIIAppInIconListClass =
                _automation.CreatePropertyCondition(
                    _propertyClassName,
                    "ToggleSwitch"
                );

            var searchGPIITriggerButton =
                _automation.CreateAndCondition(searchGPIIAppInIconListName, searchGPIIAppInIconListClass);

            Console.WriteLine(":: Finding GPII app icon switch.");
            var gpiiIconLockButton = rootElement.FindFirst(TreeScope.TreeScope_Subtree, searchGPIITriggerButton);
            if (gpiiIconLockButton == null)
            {
                Console.WriteLine("Error: No application with specified name found.");
                return;
            }
            var triggerLockButton = (IUIAutomationTogglePattern)gpiiIconLockButton.GetCurrentPattern(_tooglePattern);
            Console.WriteLine(":: Toogling GPII app icon switch.");
            triggerLockButton.Toggle();
        }
    }
}