[cmdpal][AOT] make some built-in extensions able to be published with native AOT enabled (#39802)

<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request
Base on my test, some built-in extensions can be published with native
AOT enabled with a little changes. (see this branch:
https://github.com/microsoft/PowerToys/pull/39605).

1. SystemCommands: no change need. Removed some unused code.
2. WinGet: disable marshalling. and do a little changes in
CreateInstance.
3. WindowWalker: use source generation to call CoCreateInstance.
4. WindowsTerminal: use source generation to call
IApplicationActivationManager interface.

<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist

- [x] **Closes:** #39869
- [x] **Communication:** I've discussed this with core contributors
already. If work hasn't been agreed, this work might be rejected
- [x] **Tests:** Added/updated and all pass
- [x] **Localization:** All end user facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

<!-- Provide a more detailed description of the PR, other things fixed
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

---------

Co-authored-by: Yu Leng <yuleng@microsoft.com>

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.System/Helpers/Native.cs

@@ -1,144 +0,0 @@
-// Copyright (c) Microsoft Corporation
-// The Microsoft Corporation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-using System;
-using System.Diagnostics.CodeAnalysis;
-using System.Runtime.InteropServices;
-
-namespace Microsoft.CmdPal.Ext.System.Helpers;
-
-[SuppressMessage("Interoperability", "CA1401:P/Invokes should not be visible", Justification = "We want plugins to share this NativeMethods class, instead of each one creating its own.")]
-public sealed class Native
-{
-    public enum HRESULT : uint
-    {
-        /// <summary>
-        /// Operation successful.
-        /// </summary>
-        S_OK = 0x00000000,
-
-        /// <summary>
-        /// Operation successful. (negative condition/no operation)
-        /// </summary>
-        S_FALSE = 0x00000001,
-
-        /// <summary>
-        /// Not implemented.
-        /// </summary>
-        E_NOTIMPL = 0x80004001,
-
-        /// <summary>
-        /// No such interface supported.
-        /// </summary>
-        E_NOINTERFACE = 0x80004002,
-
-        /// <summary>
-        /// Pointer that is not valid.
-        /// </summary>
-        E_POINTER = 0x80004003,
-
-        /// <summary>
-        /// Operation aborted.
-        /// </summary>
-        E_ABORT = 0x80004004,
-
-        /// <summary>
-        /// Unspecified failure.
-        /// </summary>
-        E_FAIL = 0x80004005,
-
-        /// <summary>
-        /// Unexpected failure.
-        /// </summary>
-        E_UNEXPECTED = 0x8000FFFF,
-
-        /// <summary>
-        /// General access denied error.
-        /// </summary>
-        E_ACCESSDENIED = 0x80070005,
-
-        /// <summary>
-        /// Handle that is not valid.
-        /// </summary>
-        E_HANDLE = 0x80070006,
-
-        /// <summary>
-        /// Failed to allocate necessary memory.
-        /// </summary>
-        E_OUTOFMEMORY = 0x8007000E,
-
-        /// <summary>
-        /// One or more arguments are not valid.
-        /// </summary>
-        E_INVALIDARG = 0x80070057,
-
-        /// <summary>
-        /// The operation was canceled by the user. (Error source 7 means Win32.)
-        /// </summary>
-        /// <SeeAlso href="https://learn.microsoft.com/windows/win32/debug/system-error-codes--1000-1299-"/>
-        /// <SeeAlso href="https://en.wikipedia.org/wiki/HRESULT"/>
-        E_CANCELLED = 0x800704C7,
-    }
-
-    public static class ShellItemTypeConstants
-    {
-        /// <summary>
-        /// Guid for type IShellItem.
-        /// </summary>
-        public static readonly Guid ShellItemGuid = new("43826d1e-e718-42ee-bc55-a1e261c37bfe");
-
-        /// <summary>
-        /// Guid for type IShellItem2.
-        /// </summary>
-        public static readonly Guid ShellItem2Guid = new("7E9FB0D3-919F-4307-AB2E-9B1860310C93");
-    }
-
-    /// <summary>
-    /// The following are ShellItem DisplayName types.
-    /// </summary>
-    [Flags]
-    public enum SIGDN : uint
-    {
-        NORMALDISPLAY = 0,
-        PARENTRELATIVEPARSING = 0x80018001,
-        PARENTRELATIVEFORADDRESSBAR = 0x8001c001,
-        DESKTOPABSOLUTEPARSING = 0x80028000,
-        PARENTRELATIVEEDITING = 0x80031001,
-        DESKTOPABSOLUTEEDITING = 0x8004c000,
-        FILESYSPATH = 0x80058000,
-        URL = 0x80068000,
-    }
-
-    [ComImport]
-    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
-    [Guid("43826d1e-e718-42ee-bc55-a1e261c37bfe")]
-    public interface IShellItem
-    {
-        void BindToHandler(
-            nint pbc,
-            [MarshalAs(UnmanagedType.LPStruct)] Guid bhid,
-            [MarshalAs(UnmanagedType.LPStruct)] Guid riid,
-            out nint ppv);
-
-        void GetParent(out IShellItem ppsi);
-
-        void GetDisplayName(SIGDN sigdnName, [MarshalAs(UnmanagedType.LPWStr)] out string ppszName);
-
-        void GetAttributes(uint sfgaoMask, out uint psfgaoAttribs);
-
-        void Compare(IShellItem psi, uint hint, out int piOrder);
-    }
-
-    /// <summary>
-    /// <see href="https://learn.microsoft.com/windows/win32/stg/stgm-constants">see all STGM values</see>
-    /// </summary>
-    [Flags]
-    public enum STGM : long
-    {
-        READ = 0x00000000L,
-        WRITE = 0x00000001L,
-        READWRITE = 0x00000002L,
-        CREATE = 0x00001000L,
-    }
-}

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WinGet/Microsoft.CmdPal.Ext.WinGet.csproj

@@ -32,6 +32,11 @@
     <Manifest Include="$(ApplicationManifest)" />
   </ItemGroup>
 
+  <ItemGroup>
+    <AdditionalFiles Include="NativeMethods.txt" />
+    <AdditionalFiles Include="NativeMethods.json" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\..\..\..\common\ManagedCommon\ManagedCommon.csproj" />
     <ProjectReference Include="..\..\extensionsdk\Microsoft.CommandPalette.Extensions.Toolkit\Microsoft.CommandPalette.Extensions.Toolkit.csproj" />

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WinGet/NativeMethods.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "https://aka.ms/CsWin32.schema.json",
+  "allowMarshaling": false,
+  "comInterop": {
+    "preserveSigMethods": [ "*" ]
+  }
+}

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WinGet/WindowsPackageManager.Interop/WindowsPackageManagerStandardFactory.cs

@@ -20,20 +20,25 @@ public class WindowsPackageManagerStandardFactory : WindowsPackageManagerFactory
     protected override T CreateInstance<T>(Guid clsid, Guid iid)
     {
         var pUnknown = IntPtr.Zero;
-        try
+        unsafe
         {
-            var hr = PInvoke.CoCreateInstance(clsid, null, CLSCTX.CLSCTX_ALL, iid, out var result);
-            Marshal.ThrowExceptionForHR(hr);
-            pUnknown = Marshal.GetIUnknownForObject(result);
-            return MarshalGeneric<T>.FromAbi(pUnknown);
-        }
-        finally
-        {
-            // CoCreateInstance and FromAbi both AddRef on the native object.
-            // Release once to prevent memory leak.
-            if (pUnknown != IntPtr.Zero)
+            try
             {
-                Marshal.Release(pUnknown);
+                var hr = PInvoke.CoCreateInstance(clsid, null, CLSCTX.CLSCTX_ALL, iid, out var result);
+                Marshal.ThrowExceptionForHR(hr);
+
+                pUnknown = new IntPtr(result);
+
+                return MarshalGeneric<T>.FromAbi(pUnknown);
+            }
+            finally
+            {
+                // CoCreateInstance and FromAbi both AddRef on the native object.
+                // Release once to prevent memory leak.
+                if (pUnknown != IntPtr.Zero)
+                {
+                    Marshal.Release(pUnknown);
+                }
             }
         }
     }

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowWalker/Helpers/IVirtualDesktopManager.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.Marshalling;
 
 namespace Microsoft.CmdPal.Ext.WindowWalker.Helpers;
 
@@ -11,18 +12,16 @@ namespace Microsoft.CmdPal.Ext.WindowWalker.Helpers;
 /// Interface for accessing Virtual Desktop Manager.
 /// Code used from <see href="https://learn.microsoft.com/archive/blogs/winsdk/virtual-desktop-switching-in-windows-10"./>
 /// </summary>
-[ComImport]
-[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+[GeneratedComInterface]
 [Guid("a5cd92ff-29be-454c-8d04-d82879fb3f1b")]
-[System.Security.SuppressUnmanagedCodeSecurity]
-internal interface IVirtualDesktopManager
+public partial interface IVirtualDesktopManager
 {
     [PreserveSig]
-    int IsWindowOnCurrentVirtualDesktop([In] IntPtr hTopLevelWindow, [Out] out int onCurrentDesktop);
+    int IsWindowOnCurrentVirtualDesktop(IntPtr hTopLevelWindow, out int onCurrentDesktop);
 
     [PreserveSig]
-    int GetWindowDesktopId([In] IntPtr hTopLevelWindow, [Out] out Guid desktop);
+    int GetWindowDesktopId(IntPtr hTopLevelWindow, out Guid desktop);
 
     [PreserveSig]
-    int MoveWindowToDesktop([In] IntPtr hTopLevelWindow, [MarshalAs(UnmanagedType.LPStruct)][In] Guid desktop);
+    int MoveWindowToDesktop(IntPtr hTopLevelWindow, ref Guid desktop);
 }

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowWalker/Helpers/NativeMethods.cs

@@ -13,7 +13,7 @@ using SuppressMessageAttribute = System.Diagnostics.CodeAnalysis.SuppressMessage
 namespace Microsoft.CmdPal.Ext.WindowWalker.Helpers;
 
 [SuppressMessage("Interoperability", "CA1401:P/Invokes should not be visible", Justification = "We want plugins to share this NativeMethods class, instead of each one creating its own.")]
-public static class NativeMethods
+public static partial class NativeMethods
 {
     [DllImport("user32.dll", CharSet = CharSet.Unicode)]
     public static extern int EnumWindows(EnumWindowsProc callPtr, IntPtr lParam);
@@ -99,31 +99,14 @@ public static class NativeMethods
     [return: MarshalAs(UnmanagedType.Bool)]
     public static extern bool GetFirmwareType(ref FirmwareType FirmwareType);
 
-    [DllImport("user32.dll")]
-    [return: MarshalAs(UnmanagedType.Bool)]
-    public static extern bool ExitWindowsEx(uint uFlags, uint dwReason);
-
-    [DllImport("user32")]
-    public static extern void LockWorkStation();
-
-    [DllImport("Powrprof.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
-    [return: MarshalAs(UnmanagedType.Bool)]
-    public static extern bool SetSuspendState(bool hibernate, bool forceCritical, bool disableWakeEvent);
-
-    [DllImport("Shell32.dll", CharSet = CharSet.Unicode)]
-    public static extern uint SHEmptyRecycleBin(IntPtr hWnd, uint dwFlags);
-
-    [DllImport("shlwapi.dll", CharSet = CharSet.Unicode)]
-    public static extern HRESULT SHLoadIndirectString(string pszSource, StringBuilder pszOutBuf, uint cchOutBuf, IntPtr ppvReserved);
-
-    [DllImport("shlwapi.dll", CharSet = CharSet.Unicode)]
-    public static extern HRESULT SHCreateStreamOnFileEx(string fileName, STGM grfMode, uint attributes, bool create, System.Runtime.InteropServices.ComTypes.IStream reserved, out System.Runtime.InteropServices.ComTypes.IStream stream);
-
-    [DllImport("shell32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
-    public static extern int SHCreateItemFromParsingName([MarshalAs(UnmanagedType.LPWStr)] string path, IntPtr pbc, ref Guid riid, [MarshalAs(UnmanagedType.Interface)] out IShellItem shellItem);
-
-    [DllImport("rpcrt4.dll")]
-    public static extern int UuidCreateSequential(out GUIDDATA Uuid);
+    [LibraryImport("ole32.dll")]
+    [return: MarshalAs(UnmanagedType.U4)]
+    public static partial uint CoCreateInstance(
+        ref Guid rclsid,
+        IntPtr pUnkOuter,
+        uint dwClsContext,
+        ref Guid riid,
+        out IntPtr rReturnedComObject);
 }
 
 [SuppressMessage("StyleCop.CSharp.NamingRules", "SA1310:Field names should not contain underscore", Justification = "These are the names used by win32.")]
@@ -161,19 +144,6 @@ public static class Win32Constants
     public const int RPC_S_UUID_LOCAL_ONLY = 0x720;
 }
 
-public static class ShellItemTypeConstants
-{
-    /// <summary>
-    /// Guid for type IShellItem.
-    /// </summary>
-    public static readonly Guid ShellItemGuid = new("43826d1e-e718-42ee-bc55-a1e261c37bfe");
-
-    /// <summary>
-    /// Guid for type IShellItem2.
-    /// </summary>
-    public static readonly Guid ShellItem2Guid = new("7E9FB0D3-919F-4307-AB2E-9B1860310C93");
-}
-
 public enum HRESULT : uint
 {
     /// <summary>
@@ -1124,26 +1094,6 @@ public enum ExtendedWindowStyles : uint
     WS_EX_NOACTIVATE = 0x8000000,
 }
 
-[ComImport]
-[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
-[Guid("43826d1e-e718-42ee-bc55-a1e261c37bfe")]
-public interface IShellItem
-{
-    void BindToHandler(
-        IntPtr pbc,
-        [MarshalAs(UnmanagedType.LPStruct)] Guid bhid,
-        [MarshalAs(UnmanagedType.LPStruct)] Guid riid,
-        out IntPtr ppv);
-
-    void GetParent(out IShellItem ppsi);
-
-    void GetDisplayName(SIGDN sigdnName, [MarshalAs(UnmanagedType.LPWStr)] out string ppszName);
-
-    void GetAttributes(uint sfgaoMask, out uint psfgaoAttribs);
-
-    void Compare(IShellItem psi, uint hint, out int piOrder);
-}
-
 /// <summary>
 /// The following are ShellItem DisplayName types.
 /// </summary>

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowWalker/Helpers/VirtualDesktopHelper.cs

@@ -6,6 +6,7 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.Marshalling;
 using System.Text;
 
 using Microsoft.CmdPal.Ext.WindowWalker.Properties;
@@ -48,6 +49,10 @@ public class VirtualDesktopHelper
     /// </summary>
     private readonly List<Guid> _availableDesktops = [];
 
+#pragma warning disable SA1306 // Field names should begin with lower-case letter
+    private readonly uint CLSCTXINPROCALL = 0x17;
+#pragma warning restore SA1306 // Field names should begin with lower-case letter
+
     /// <summary>
     /// Id of the current visible Desktop.
     /// </summary>
@@ -55,15 +60,27 @@ public class VirtualDesktopHelper
 
     private static readonly CompositeFormat VirtualDesktopHelperDesktop = System.Text.CompositeFormat.Parse(Properties.Resources.VirtualDesktopHelper_Desktop);
 
+    private Guid iVirtualDesktopManagerCLSID = new("aa509086-5ca9-4c25-8f95-589d3c07b48a");
+
+    private Guid iVirtualDesktopManagerIID = new("a5cd92ff-29be-454c-8d04-d82879fb3f1b");
+
     /// <summary>
     /// Initializes a new instance of the <see cref="VirtualDesktopHelper"/> class.
     /// </summary>
     /// <param name="desktopListUpdate">Setting to configure if the list of available desktops should update automatically or only when calling <see cref="UpdateDesktopList"/>. Per default this is set to manual update (false) to have less registry queries.</param>
     public VirtualDesktopHelper(bool desktopListUpdate = false)
     {
+        var cw = new StrategyBasedComWrappers();
+
         try
         {
-            _virtualDesktopManager = (IVirtualDesktopManager)new CVirtualDesktopManager();
+            var hr = NativeMethods.CoCreateInstance(ref this.iVirtualDesktopManagerCLSID, nint.Zero, CLSCTXINPROCALL, ref iVirtualDesktopManagerIID, out var virtualDesktopManagerPtr);
+            if (hr != 0)
+            {
+                throw new ArgumentException($"Failed to create IVirtualDesktopManager instance. HR: 0x{hr:X}");
+            }
+
+            _virtualDesktopManager = (IVirtualDesktopManager)cw.GetOrCreateObjectForComInstance(virtualDesktopManagerPtr, CreateObjectFlags.None);
         }
         catch (COMException ex)
         {
@@ -409,7 +426,7 @@ public class VirtualDesktopHelper
     /// <param name="hWindow">Handle of the top level window.</param>
     /// <param name="desktopId">Guid of the target desktop.</param>
     /// <returns><see langword="True"/> on success and <see langword="false"/> on failure.</returns>
-    public bool MoveWindowToDesktop(IntPtr hWindow, in Guid desktopId)
+    public bool MoveWindowToDesktop(IntPtr hWindow, ref Guid desktopId)
     {
         if (_virtualDesktopManager == null)
         {
@@ -417,7 +434,7 @@ public class VirtualDesktopHelper
             return false;
         }
 
-        var hr = _virtualDesktopManager.MoveWindowToDesktop(hWindow, desktopId);
+        var hr = _virtualDesktopManager.MoveWindowToDesktop(hWindow, ref desktopId);
         if (hr != (int)HRESULT.S_OK)
         {
             ExtensionHost.LogMessage(new LogMessage() { Message = "VirtualDesktopHelper.MoveWindowToDesktop() failed: An exception was thrown when moving the window ({hWindow}) to another desktop ({desktopId})." });
@@ -455,7 +472,7 @@ public class VirtualDesktopHelper
         }
 
         Guid newDesktop = _availableDesktops[windowDesktopNumber - 1];
-        return MoveWindowToDesktop(hWindow, newDesktop);
+        return MoveWindowToDesktop(hWindow, ref newDesktop);
     }
 
     /// <summary>
@@ -486,7 +503,7 @@ public class VirtualDesktopHelper
         }
 
         Guid newDesktop = _availableDesktops[windowDesktopNumber + 1];
-        return MoveWindowToDesktop(hWindow, newDesktop);
+        return MoveWindowToDesktop(hWindow, ref newDesktop);
     }
 
     /// <summary>

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowsTerminal/Commands/LaunchProfileAsAdminCommand.cs

@@ -3,18 +3,12 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using System.Resources;
-using System.Text;
-using System.Threading.Tasks;
+using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.Marshalling;
 using ManagedCommon;
 using Microsoft.CmdPal.Ext.WindowsTerminal.Helpers;
 using Microsoft.CmdPal.Ext.WindowsTerminal.Properties;
-using Microsoft.CommandPalette.Extensions;
 using Microsoft.CommandPalette.Extensions.Toolkit;
-using Windows.UI;
 
 namespace Microsoft.CmdPal.Ext.WindowsTerminal.Commands;
 
@@ -68,7 +62,23 @@ internal sealed partial class LaunchProfileAsAdminCommand : InvokableCommand
 
     private void Launch(string id, string profile)
     {
-        var appManager = new ApplicationActivationManager();
+        ComWrappers cw = new StrategyBasedComWrappers();
+
+        var hr = NativeHelpers.CoCreateInstance(ref NativeHelpers.ApplicationActivationManagerCLSID, IntPtr.Zero, NativeHelpers.CLSCTXINPROCALL, ref NativeHelpers.ApplicationActivationManagerIID, out var appManagerPtr);
+
+        if (hr != 0)
+        {
+            throw new ArgumentException($"Failed to create IApplicationActivationManager instance. HR: 0x{hr:X}");
+        }
+
+        var appManager = (IApplicationActivationManager)cw.GetOrCreateObjectForComInstance(
+            appManagerPtr, CreateObjectFlags.None);
+
+        if (appManager == null)
+        {
+            throw new ArgumentException("Failed to get IApplicationActivationManager interface");
+        }
+
         const ActivateOptions noFlags = ActivateOptions.None;
         var queryArguments = TerminalHelper.GetArguments(profile, _openNewTab, _openQuake);
         try

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowsTerminal/Commands/LaunchProfileCommand.cs

@@ -3,18 +3,12 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using System.Resources;
-using System.Text;
-using System.Threading.Tasks;
+using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.Marshalling;
 using ManagedCommon;
 using Microsoft.CmdPal.Ext.WindowsTerminal.Helpers;
 using Microsoft.CmdPal.Ext.WindowsTerminal.Properties;
-using Microsoft.CommandPalette.Extensions;
 using Microsoft.CommandPalette.Extensions.Toolkit;
-using Windows.UI;
 
 namespace Microsoft.CmdPal.Ext.WindowsTerminal.Commands;
 
@@ -38,7 +32,22 @@ internal sealed partial class LaunchProfileCommand : InvokableCommand
 
     private void Launch(string id, string profile)
     {
-        var appManager = new ApplicationActivationManager();
+        ComWrappers cw = new StrategyBasedComWrappers();
+
+        var hr = NativeHelpers.CoCreateInstance(ref NativeHelpers.ApplicationActivationManagerCLSID, IntPtr.Zero, NativeHelpers.CLSCTXINPROCALL, ref NativeHelpers.ApplicationActivationManagerIID, out var appManagerPtr);
+        if (hr != 0)
+        {
+            throw new ArgumentException($"Failed to create IApplicationActivationManager instance. HR: 0x{hr:X}");
+        }
+
+        var appManager = (IApplicationActivationManager)cw.GetOrCreateObjectForComInstance(
+            appManagerPtr, CreateObjectFlags.None);
+
+        if (appManager == null)
+        {
+            throw new ArgumentException("Failed to get IApplicationActivationManager interface");
+        }
+
         const ActivateOptions noFlags = ActivateOptions.None;
         var queryArguments = TerminalHelper.GetArguments(profile, _openNewTab, _openQuake);
         try

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowsTerminal/Helpers/ApplicationActivationManager.cs

@@ -1,24 +0,0 @@
-// Copyright (c) Microsoft Corporation
-// The Microsoft Corporation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-using System;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-namespace Microsoft.CmdPal.Ext.WindowsTerminal.Helpers;
-
-// Application Activation Manager Class
-[ComImport]
-[Guid("45BA127D-10A8-46EA-8AB7-56EA9078943C")]
-public class ApplicationActivationManager : IApplicationActivationManager
-{
-    [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)/*, PreserveSig*/]
-    public extern IntPtr ActivateApplication([In] string appUserModelId, [In] string arguments, [In] ActivateOptions options, [Out] out uint processId);
-
-    [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
-    public extern IntPtr ActivateForFile([In] string appUserModelId, [In] IntPtr /*IShellItemArray* */ itemArray, [In] string verb, [Out] out uint processId);
-
-    [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
-    public extern IntPtr ActivateForProtocol([In] string appUserModelId, [In] IntPtr /* IShellItemArray* */itemArray, [Out] out uint processId);
-}

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowsTerminal/Helpers/IApplicationActivationManager.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.Marshalling;
 
 namespace Microsoft.CmdPal.Ext.WindowsTerminal.Helpers;
 
@@ -18,14 +19,13 @@ public enum ActivateOptions
 }
 
 // ApplicationActivationManager
-[ComImport]
+[GeneratedComInterface(StringMarshalling = StringMarshalling.Utf16)]
 [Guid("2e941141-7f97-4756-ba1d-9decde894a3d")]
-[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
-public interface IApplicationActivationManager
+public partial interface IApplicationActivationManager
 {
-    IntPtr ActivateApplication([In] string appUserModelId, [In] string arguments, [In] ActivateOptions options, [Out] out uint processId);
+    void ActivateApplication(string appUserModelId, string arguments, ActivateOptions options, out uint processId);
 
-    IntPtr ActivateForFile([In] string appUserModelId, [In] IntPtr /*IShellItemArray* */ itemArray, [In] string verb, [Out] out uint processId);
+    void ActivateForFile(string appUserModelId, IntPtr /*IShellItemArray* */ itemArray, string verb, out uint processId);
 
-    IntPtr ActivateForProtocol([In] string appUserModelId, [In] IntPtr /* IShellItemArray* */itemArray, [Out] out uint processId);
+    void ActivateForProtocol(string appUserModelId, IntPtr /* IShellItemArray* */itemArray, out uint processId);
 }

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowsTerminal/Helpers/NativeHelpers.cs

@@ -0,0 +1,32 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Microsoft.CmdPal.Ext.WindowsTerminal.Helpers;
+
+public sealed partial class NativeHelpers
+{
+    public const uint CLSCTXINPROCALL = 0x17;
+
+    [LibraryImport("ole32.dll")]
+    public static partial uint CoCreateInstance(
+        ref Guid rclsid,
+        IntPtr pUnkOuter,
+        uint dwClsContext,
+        ref Guid riid,
+        out IntPtr rReturnedComObject);
+
+#pragma warning disable CA2211 // Non-constant fields should not be visible
+#pragma warning disable SA1401 // Fields should be private
+    public static Guid ApplicationActivationManagerCLSID = new Guid("45BA127D-10A8-46EA-8AB7-56EA9078943C");
+    public static Guid ApplicationActivationManagerIID = new Guid("2e941141-7f97-4756-ba1d-9decde894a3d");
+#pragma warning restore SA1401 // Fields should be private
+#pragma warning restore CA2211 // Non-constant fields should not be visible
+}