Add a Windows 11 Explorer context menu

Build/AppxManifest.xml

@@ -1,8 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10" 
+         xmlns:com="http://schemas.microsoft.com/appx/manifest/com/windows10"
          xmlns:desktop="http://schemas.microsoft.com/appx/manifest/desktop/windows10" 
+         xmlns:desktop4="http://schemas.microsoft.com/appx/manifest/desktop/windows10/4"
+         xmlns:desktop5="http://schemas.microsoft.com/appx/manifest/desktop/windows10/5"
          xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities" 
-         xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10">
+         xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
+         IgnorableNamespaces="com desktop4 desktop5">
   <!-- Invalid package identity name: QL-Win.QuickLook (expected: 21090PaddyXu.QuickLook) -->
   <!-- Invalid package family name: QL-Win.QuickLook_wgqddy12gm212 (expected: 21090PaddyXu.QuickLook_egxr34yet59cg) -->
   <!-- Invalid package publisher name: CN=F4F538EC-55CB-41B8-9531-25CC140D0339 (expected: CN=CE36AF3D-FF94-43EB-9908-7EC8FD1D29FB) -->
@@ -36,6 +40,26 @@
                            EntryPoint="Windows.FullTrustApplication">
           <desktop:StartupTask TaskId="QuickLookTask" Enabled="true" DisplayName="QuickLook" />
         </desktop:Extension>
+        <com:Extension Category="windows.comServer">
+          <com:ComServer>
+            <com:SurrogateServer DisplayName="QuickLook">
+              <com:Class Id="A7C3E4B1-5D28-4F6A-9B30-8E1F2A4C6D70" Path="Package\QuickLook.Native64.dll" ThreadingModel="STA" />
+            </com:SurrogateServer>
+          </com:ComServer>
+        </com:Extension>
+        <desktop4:Extension Category="windows.fileExplorerContextMenus">
+          <desktop4:FileExplorerContextMenus>
+            <desktop5:ItemType Type="*">
+              <desktop5:Verb Id="QuickLookFile" Clsid="A7C3E4B1-5D28-4F6A-9B30-8E1F2A4C6D70" />
+            </desktop5:ItemType>
+            <desktop5:ItemType Type="Directory">
+              <desktop5:Verb Id="QuickLookDirectory" Clsid="A7C3E4B1-5D28-4F6A-9B30-8E1F2A4C6D70" />
+            </desktop5:ItemType>
+            <desktop5:ItemType Type="Directory\Background">
+              <desktop5:Verb Id="QuickLookBackground" Clsid="A7C3E4B1-5D28-4F6A-9B30-8E1F2A4C6D70" />
+            </desktop5:ItemType>
+          </desktop4:FileExplorerContextMenus>
+        </desktop4:Extension>
       </Extensions>
       <uap:VisualElements DisplayName="QuickLook" 
                           Description="Bring macOS &#8220;Quick Look&#8221; feature to Windows" 

QuickLook.Common/Helpers/ProcessHelper.cs

@@ -20,6 +20,7 @@
 using System.Diagnostics;
 using System.IO;
 using System.Reflection;
+using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
 
@@ -44,8 +45,17 @@ public static bool IsRunningAsUWP()
         {
             uint len = 0;
             var r = Kernel32.GetCurrentPackageFullName(ref len, null);
+            if (r != ErrorInsufficientBuffer || len == 0)
+                return false;
 
-            return r == ErrorInsufficientBuffer;
+            var name = new StringBuilder((int)len);
+            r = Kernel32.GetCurrentPackageFullName(ref len, name);
+            if (r != 0)
+                return false;
+
+            // The shell sparse package also gives this process an identity.
+            // Store behavior applies only to the Store package.
+            return name.ToString().StartsWith("21090PaddyXu.QuickLook_", StringComparison.Ordinal);
         }
         catch (EntryPointNotFoundException)
         {

QuickLook.Native/QuickLook.Native32/ContextMenuExports.cpp

@@ -0,0 +1,49 @@
+// Copyright © 2017-2026 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "ExplorerCommand.h"
+
+#include "ContextMenuGuid.h"
+
+#include <new>
+
+HMODULE g_module = nullptr;
+long g_moduleRefs = 0;
+long g_moduleLocks = 0;
+
+STDAPI DllCanUnloadNow()
+{
+    return (g_moduleRefs == 0 && g_moduleLocks == 0) ? S_OK : S_FALSE;
+}
+
+STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, void** ppv)
+{
+    if (ppv == nullptr)
+        return E_POINTER;
+
+    *ppv = nullptr;
+    if (rclsid != CLSID_QuickLookCommand)
+        return CLASS_E_CLASSNOTAVAILABLE;
+
+    auto* factory = new (std::nothrow) ClassFactory();
+    if (factory == nullptr)
+        return E_OUTOFMEMORY;
+
+    const HRESULT hr = factory->QueryInterface(riid, ppv);
+    factory->Release();
+    return hr;
+}

QuickLook.Native/QuickLook.Native32/ContextMenuGuid.h

@@ -0,0 +1,24 @@
+// Copyright © 2017-2026 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <windows.h>
+
+// {A7C3E4B1-5D28-4F6A-9B30-8E1F2A4C6D70}
+static const GUID CLSID_QuickLookCommand = {
+    0xa7c3e4b1, 0x5d28, 0x4f6a, {0x9b, 0x30, 0x8e, 0x1f, 0x2a, 0x4c, 0x6d, 0x70}};