Feature: Added an out-of-proc WinRT server for long-running background tasks

.github/workflows/ci.yml

@@ -97,10 +97,10 @@ jobs:
     - name: Setup NuGet
       uses: NuGet/[email protected]
 
-    - name: Setup .NET 7
+    - name: Setup .NET 8
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: '7.0.x'
+        dotnet-version: '8.0.x'
 
     - name: Restore NuGet
       shell: pwsh

.github/workflows/deploy-preview.yml

@@ -34,10 +34,10 @@ jobs:
     - name: Setup NuGet
       uses: NuGet/[email protected]
 
-    - name: Setup .NET 7
+    - name: Setup .NET 8
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: '7.0.x'
+        dotnet-version: '8.0.x'
 
     # TODO: Move the command to PowerShell script instead
     - name: Update Package.appxmanifest

Files.sln

@@ -27,11 +27,16 @@ EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Files.App.Launcher", "src\Files.App.Launcher\Files.App.Launcher.vcxproj", "{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Files.App", "src\Files.App\Files.App.csproj", "{6F431D82-A5FF-4833-B5E4-702E1E523126}"
+	ProjectSection(ProjectDependencies) = postProject
+		{1EE996D6-885E-4403-A461-26C7A4E14D26} = {1EE996D6-885E-4403-A461-26C7A4E14D26}
+	EndProjectSection
 EndProject
 Project("{C7167F0D-BC9F-4E6E-AFE1-012C56B48DB5}") = "Files.Package", "src\Files.App (Package)\Files.Package.wapproj", "{8F60FD8E-1921-47D6-97B0-D26D7B3A4999}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Files.Core.SourceGenerator", "src\Files.Core.SourceGenerator\Files.Core.SourceGenerator.csproj", "{6FA07816-DE0A-4D49-84E8-38E953A33C87}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Files.App.Server", "src\Files.App.Server\Files.App.Server.csproj", "{1EE996D6-885E-4403-A461-26C7A4E14D26}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|arm64 = Debug|arm64
@@ -378,30 +383,66 @@ Global
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Debug|x64.Build.0 = Debug|Any CPU
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Debug|x86.ActiveCfg = Debug|Any CPU
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Debug|x86.Build.0 = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|arm64.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|arm64.Build.0 = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|x64.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|x64.Build.0 = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|x86.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|x86.Build.0 = Debug|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|arm64.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|arm64.Build.0 = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|x64.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|x64.Build.0 = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|x86.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Preview|x86.Build.0 = Release|Any CPU
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Release|arm64.ActiveCfg = Release|Any CPU
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Release|arm64.Build.0 = Release|Any CPU
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Release|x64.ActiveCfg = Release|Any CPU
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Release|x64.Build.0 = Release|Any CPU
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Release|x86.ActiveCfg = Release|Any CPU
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Release|x86.Build.0 = Release|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|arm64.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|arm64.Build.0 = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|x64.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|x64.Build.0 = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|x86.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|x86.Build.0 = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|arm64.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|arm64.Build.0 = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|x64.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|x64.Build.0 = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|x86.ActiveCfg = Debug|Any CPU
-		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|x86.Build.0 = Debug|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|arm64.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|arm64.Build.0 = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|x64.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|x64.Build.0 = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|x86.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Stable|x86.Build.0 = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|arm64.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|arm64.Build.0 = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|x64.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|x64.Build.0 = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|x86.ActiveCfg = Release|Any CPU
+		{6FA07816-DE0A-4D49-84E8-38E953A33C87}.Store|x86.Build.0 = Release|Any CPU
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|arm64.ActiveCfg = Debug|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|arm64.Build.0 = Debug|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|arm64.Deploy.0 = Debug|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|x64.ActiveCfg = Debug|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|x64.Build.0 = Debug|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|x64.Deploy.0 = Debug|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|x86.ActiveCfg = Debug|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|x86.Build.0 = Debug|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Debug|x86.Deploy.0 = Debug|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Preview|arm64.ActiveCfg = Preview|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Preview|arm64.Build.0 = Preview|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Preview|x64.ActiveCfg = Preview|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Preview|x64.Build.0 = Preview|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Preview|x86.ActiveCfg = Preview|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Preview|x86.Build.0 = Preview|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|arm64.ActiveCfg = Release|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|arm64.Build.0 = Release|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|arm64.Deploy.0 = Release|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|x64.ActiveCfg = Release|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|x64.Build.0 = Release|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|x64.Deploy.0 = Release|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|x86.ActiveCfg = Release|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|x86.Build.0 = Release|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Release|x86.Deploy.0 = Release|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Stable|arm64.ActiveCfg = Stable|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Stable|arm64.Build.0 = Stable|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Stable|x64.ActiveCfg = Stable|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Stable|x64.Build.0 = Stable|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Stable|x86.ActiveCfg = Stable|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Stable|x86.Build.0 = Stable|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Store|arm64.ActiveCfg = Store|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Store|arm64.Build.0 = Store|arm64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Store|x64.ActiveCfg = Store|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Store|x64.Build.0 = Store|x64
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Store|x86.ActiveCfg = Store|x86
+		{1EE996D6-885E-4403-A461-26C7A4E14D26}.Store|x86.Build.0 = Store|x86
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -420,6 +461,7 @@ Global
 		{6F431D82-A5FF-4833-B5E4-702E1E523126} = {A188C26B-E731-4E0B-9D17-D21CEBD9B43F}
 		{8F60FD8E-1921-47D6-97B0-D26D7B3A4999} = {A188C26B-E731-4E0B-9D17-D21CEBD9B43F}
 		{6FA07816-DE0A-4D49-84E8-38E953A33C87} = {9F36C2AD-005D-4EA5-A1F1-6BC42773FC85}
+		{1EE996D6-885E-4403-A461-26C7A4E14D26} = {A188C26B-E731-4E0B-9D17-D21CEBD9B43F}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {0E62043C-A7A1-4982-9EC9-4CDB2939B776}

builds/azure-pipelines-release.yml

@@ -114,8 +114,8 @@ jobs:
   - task: UseDotNet@2
     inputs:
       packageType: sdk
-      version: 7.0.x
-      includePreviewVersions: true
+      version: 8.0.x
+      includePreviewVersions: false
 
   - task: CmdLine@2
     inputs:
@@ -240,8 +240,8 @@ jobs:
   - task: UseDotNet@2
     inputs:
       packageType: sdk
-      version: 7.0.x
-      includePreviewVersions: true
+      version: 8.0.x
+      includePreviewVersions: false
 
   - task: CmdLine@2
     inputs:

src/Files.App (Package)/Files.Package.wapproj

@@ -5,7 +5,7 @@
     <ProjectGuid>8f60fd8e-1921-47d6-97b0-d26d7b3a4999</ProjectGuid>
     <TargetPlatformVersion>10.0.22621.0</TargetPlatformVersion>
     <TargetPlatformMinVersion>10.0.19041.0</TargetPlatformMinVersion>
-    <AssetTargetFallback>net7.0-windows$(TargetPlatformVersion);$(AssetTargetFallback)</AssetTargetFallback>
+    <AssetTargetFallback>net8.0-windows$(TargetPlatformVersion);$(AssetTargetFallback)</AssetTargetFallback>
     <DefaultLanguage>en-US</DefaultLanguage>
     <GenerateAppInstallerFile>False</GenerateAppInstallerFile>
     <AppxAutoIncrementPackageRevision>False</AppxAutoIncrementPackageRevision>
@@ -98,14 +98,23 @@
     <Content Include="Package.appinstaller" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\Files.App.Server\Files.App.Server.csproj">
+      <SkipGetTargetFrameworkProperties>True</SkipGetTargetFrameworkProperties>
+      <PublishProfile>Properties\PublishProfiles\win-$(Platform).pubxml</PublishProfile>
+    </ProjectReference>
     <ProjectReference Include="..\Files.App\Files.App.csproj">
       <SkipGetTargetFrameworkProperties>True</SkipGetTargetFrameworkProperties>
-      <PublishProfile>Properties\PublishProfiles\win10-$(Platform).pubxml</PublishProfile>
+      <PublishProfile>Properties\PublishProfiles\win-$(Platform).pubxml</PublishProfile>
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.4.231115000" IncludeAssets="build" />
     <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22621.2428" IncludeAssets="build" />
   </ItemGroup>
   <Import Project="$(WapProjPath)\Microsoft.DesktopBridge.targets" />
+  <Target Name="RemoveOutOfProcWinMD" BeforeTargets="_GenerateCurrentProjectAppxManifest">
+    <ItemGroup>
+      <_AppxWinmdFilesToHarvest Condition="'%(FileName)' == 'Files.App.Server'" Remove="@(_AppxWinmdFilesToHarvest)" />
+    </ItemGroup>
+  </Target>
 </Project>

src/Files.App (Package)/Package.appxmanifest

@@ -160,6 +160,13 @@
                 <ActivatableClass ActivatableClassId="Files.App.BackgroundTasks.UpdateTask" ThreadingModel="both" />
             </InProcessServer>
         </Extension>
+        <Extension Category="windows.activatableClass.outOfProcessServer">
+            <OutOfProcessServer ServerName="Files.App.Server" uap5:IdentityType="activateAsPackage" uap5:RunFullTrust="true">
+                <Path>Files.App.Server\Files.App.Server.exe</Path>
+                <Instancing>singleInstance</Instancing>
+                <ActivatableClass ActivatableClassId="Files.App.Server.AppInstanceMonitor" />
+            </OutOfProcessServer>
+        </Extension>
     </Extensions>
 
     <Capabilities>

src/Files.App.BackgroundTasks/Files.App.BackgroundTasks.csproj

@@ -2,13 +2,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net7.0-windows10.0.22621.0</TargetFramework>
+        <TargetFramework>net8.0-windows10.0.22621.0</TargetFramework>
         <DefaultLanguage>en-US</DefaultLanguage>
         <TargetPlatformMinVersion>10.0.19041.0</TargetPlatformMinVersion>
         <IsTrimmable>true</IsTrimmable>
         <Configurations>Debug;Release;Stable;Preview;Store</Configurations>
         <Platforms>x86;x64;ARM64</Platforms>
-        <RuntimeIdentifiers>win10-x86;win10-x64;win10-arm64</RuntimeIdentifiers>
+        <RuntimeIdentifiers>win-x86;win-x64;win-arm64</RuntimeIdentifiers>
     </PropertyGroup>
 
     <PropertyGroup>
@@ -17,6 +17,14 @@
         <CsWinRTGeneratedFilesDir>$(MSBuildProjectDirectory)\bin\$(Platform)\$(Configuration)</CsWinRTGeneratedFilesDir>
     </PropertyGroup>
 
+    <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
+        <DefineConstants>TRACE;DEBUG;NETFX_CORE</DefineConstants>
+    </PropertyGroup>
+    <PropertyGroup Condition="'$(Configuration)' != 'Debug'">
+        <DefineConstants>TRACE;RELEASE;NETFX_CORE</DefineConstants>
+        <Optimize>true</Optimize>
+    </PropertyGroup>
+
     <ItemGroup>
         <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.0.4" />
     </ItemGroup>

src/Files.App.Server/AppInstanceMonitor.cs

@@ -0,0 +1,29 @@
+using System.Diagnostics;
+
+namespace Files.App.Server;
+
+public sealed class AppInstanceMonitor
+{
+	private static int processCount = 0;
+
+	public static void StartMonitor(int processId)
+	{
+		var process = Process.GetProcessById(processId);
+		Interlocked.Increment(ref processCount);
+		process.EnableRaisingEvents = true;
+		process.Exited += Process_Exited;
+	}
+
+	private static void Process_Exited(object? sender, EventArgs e)
+	{
+		if (sender is Process process)
+		{
+			process.Dispose();
+
+			if (Interlocked.Decrement(ref processCount) == 0)
+			{
+				Program.ExitSignalEvent.Set();
+			}
+		}
+	}
+}

src/Files.App.Server/Files.App.Server.csproj

@@ -0,0 +1,57 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>WinExe</OutputType>
+        <DefaultLanguage>en-US</DefaultLanguage>
+        <AppxBundleAutoResourcePackageQualifiers>Scale|DXFeatureLevel</AppxBundleAutoResourcePackageQualifiers>
+        <AppxDefaultResourceQualifiers>Language=en-US;af;ar;bg;ca;cs-CZ;da;da-DK;de-DE;el;en-GB;es-ES;es-419;fa-IR;fi-FI;fil-PH;fr-FR;he-IL;hi-IN;hu-HU;id-ID;it-IT;ja-JP;ka;ko-KR;lt;lv-LV;nb-NO;nl-NL;or-IN;pl-PL;pt-BR;pt-PT;ro-RO;ru-RU;sk-SK;sv-SE;ta;th-TH;tr-TR;uk-UA;vi;zh-Hans;zh-Hant</AppxDefaultResourceQualifiers>
+        <TargetFramework>net8.0-windows10.0.22621.0</TargetFramework>
+        <TargetPlatformMinVersion>10.0.19041.0</TargetPlatformMinVersion>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <Configurations>Debug;Release;Stable;Preview;Store</Configurations>
+        <Platforms>x86;x64;arm64</Platforms>
+        <SelfContained>true</SelfContained>
+        <RuntimeIdentifiers>win-x86;win-x64;win-arm64</RuntimeIdentifiers>
+        <RuntimeIdentifier Condition="'$(Platform)' == 'x86'">win-x86</RuntimeIdentifier>
+        <RuntimeIdentifier Condition="'$(Platform)' == 'x64'">win-x64</RuntimeIdentifier>
+        <RuntimeIdentifier Condition="'$(Platform)' == 'arm64'">win-arm64</RuntimeIdentifier>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+        <CsWinRTComponent>true</CsWinRTComponent>
+        <CsWinRTWindowsMetadata>10.0.22621.0</CsWinRTWindowsMetadata>
+        <ApplicationManifest>app.manifest</ApplicationManifest>
+        <PublishReadyToRun Condition="'$(Configuration)' == 'Debug'">False</PublishReadyToRun>
+        <PublishReadyToRun Condition="'$(Configuration)' != 'Debug'">True</PublishReadyToRun>
+        <PublishReadyToRunComposite Condition="'$(Configuration)' != 'Debug'">True</PublishReadyToRunComposite>
+        <PublishTrimmed Condition="'$(Configuration)' == 'Debug'">False</PublishTrimmed>
+        <PublishTrimmed Condition="'$(Configuration)' != 'Debug'">True</PublishTrimmed>
+    </PropertyGroup>
+
+    <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
+        <DefineConstants>TRACE;DEBUG;NETFX_CORE</DefineConstants>
+    </PropertyGroup>
+    <PropertyGroup Condition="'$(Configuration)' != 'Debug'">
+        <DefineConstants>TRACE;RELEASE;NETFX_CORE</DefineConstants>
+        <Optimize>true</Optimize>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <Manifest Include="app.manifest" />
+        <TrimmerRootAssembly Include="Files.App.Server" />
+        <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.0.4" />
+        <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.1.647-beta" PrivateAssets="all" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <None Include="..\Files.App.Server\bin\$(Platform)\$(Configuration)\$(TargetFramework)\win-$(Platform)\Files.App.Server.winmd">
+            <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+            <Link>Files.App.Server.winmd</Link>
+            <Visible>false</Visible>
+        </None>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\Files.Shared\Files.Shared.csproj" />
+    </ItemGroup>
+
+</Project>

src/Files.App.Server/Helpers.cs

@@ -0,0 +1,39 @@
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using WinRT;
+
+namespace Files.App.Server;
+
+unsafe partial class Helpers
+{
+	[UnmanagedCallersOnly(CallConvs = [typeof(CallConvStdcall)])]
+	public static int GetActivationFactory(void* activatableClassId, void** factory)
+	{
+		const int E_INVALIDARG = unchecked((int)0x80070057);
+		const int CLASS_E_CLASSNOTAVAILABLE = unchecked((int)0x80040111);
+		const int S_OK = 0;
+
+		if (activatableClassId is null || factory is null)
+		{
+			return E_INVALIDARG;
+		}
+
+		try
+		{
+			IntPtr obj = Module.GetActivationFactory(MarshalString.FromAbi((IntPtr)activatableClassId));
+
+			if ((void*)obj is null)
+			{
+				return CLASS_E_CLASSNOTAVAILABLE;
+			}
+
+			*factory = (void*)obj;
+			return S_OK;
+		}
+		catch (Exception e)
+		{
+			ExceptionHelpers.SetErrorInfo(e);
+			return ExceptionHelpers.GetHRForException(e);
+		}
+	}
+}

src/Files.App.Server/NativeMethods.json

@@ -0,0 +1,28 @@
+// Copyright (c) 2023 Files Community
+// Licensed under the MIT License. See the LICENSE.
+{
+	"$schema": "https://aka.ms/CsWin32.schema.json",
+
+	// Emit COM interfaces instead of structs, and allow generation of non-blittable structs for the sake of an easier to use API.
+	"allowMarshaling": true,
+
+	// A value indicating whether to generate APIs judged to be unnecessary or redundant given the target framework.
+	// This is useful for multi-targeting projects that need a consistent set of APIs across target frameworks
+	// to avoid too many conditional compilation regions.
+	"multiTargetingFriendlyAPIs": false,
+
+	// A value indicating whether friendly overloads should use safe handles.
+	"useSafeHandles": true,
+
+	// Omit ANSI functions and remove `W` suffix from UTF-16 functions.
+	"wideCharOnly": true,
+
+	// A value indicating whether to emit a single source file as opposed to types spread across many files.
+	"emitSingleFile": false,
+
+	// The name of a single class under which all p/invoke methods and constants are generated, regardless of imported module.
+	"className": "PInvoke",
+
+	// A value indicating whether to expose the generated APIs publicly (as opposed to internally).
+	"public": true
+}