[FZE] Send close signal to Editor when the main app closes (#12510)

.github/actions/spell-check/expect.txt

@@ -664,6 +664,7 @@ Functiondiscoverykeys
 fwlink
 fwrite
 fxcop
+FZE
 gabime
 GAC
 gacutil

src/common/interop/interop.cpp

@@ -179,6 +179,10 @@ public
             return gcnew String(CommonSharedConstants::RUN_EXIT_EVENT);
         }
 
+        static String ^ FZEExitEvent() {
+            return gcnew String(CommonSharedConstants::FZE_EXIT_EVENT);
+        }
+
         static String ^ ColorPickerSendSettingsTelemetryEvent() {
             return gcnew String(CommonSharedConstants::COLOR_PICKER_SEND_SETTINGS_TELEMETRY_EVENT);
         }

src/common/interop/shared_constants.h

@@ -19,6 +19,8 @@ namespace CommonSharedConstants
 
     const wchar_t RUN_EXIT_EVENT[] = L"Local\\PowerToysRunExitEvent-3e38e49d-a762-4ef1-88f2-fd4bc7481516";
     
+    const wchar_t FZE_EXIT_EVENT[] = L"Local\\PowerToys-FZE-ExitEvent-ca8c73de-a52c-4274-b691-46e9592d3b43";
+
     const wchar_t COLOR_PICKER_SEND_SETTINGS_TELEMETRY_EVENT[] = L"Local\\ColorPickerSettingsTelemetryEvent-6c7071d8-4014-46ec-b687-913bd8a422f1";
 
     // Path to the event used to show Color Picker

src/modules/fancyzones/FancyZonesModuleInterface/dllmain.cpp

@@ -164,11 +164,30 @@ private:
         }
     }
 
+    void SendFZECloseEvent()
+    {
+        auto exitEvent = CreateEventW(nullptr, false, false, CommonSharedConstants::FZE_EXIT_EVENT);
+        if (!exitEvent)
+        {
+            Logger::warn(L"Failed to create exitEvent. {}", get_last_error_or_default(GetLastError()));
+        }
+        else
+        {
+            Logger::trace(L"Signaled exitEvent");
+            if (!SetEvent(exitEvent))
+            {
+                Logger::warn(L"Failed to signal exitEvent. {}", get_last_error_or_default(GetLastError()));
+            }
+
+            ResetEvent(exitEvent);
+            CloseHandle(exitEvent);
+        }
+    }
+
     void Disable(bool const traceEvent)
     {
         m_enabled = false;
         // Log telemetry
-
         if (traceEvent)
         {
             Trace::FancyZones::EnableFancyZones(false);
@@ -182,6 +201,7 @@ private:
         if (m_hProcess)
         {
             TerminateProcess(m_hProcess, 0);
+            SendFZECloseEvent();
             m_hProcess = nullptr;
         }
     }

src/modules/fancyzones/editor/FancyZonesEditor/App.xaml.cs

@@ -80,6 +80,15 @@ namespace FancyZonesEditor
             FancyZonesEditorIO = new FancyZonesEditorIO();
             Overlay = new Overlay();
             MainWindowSettings = new MainWindowSettingsModel();
+
+            new Thread(() =>
+            {
+                var eventHandle = new EventWaitHandle(false, EventResetMode.AutoReset, interop.Constants.FZEExitEvent());
+                if (eventHandle.WaitOne())
+                {
+                    Environment.Exit(0);
+                }
+            }).Start();
         }
 
         private void OnStartup(object sender, StartupEventArgs e)

src/modules/fancyzones/editor/FancyZonesEditor/FancyZonesEditor.csproj

@@ -81,6 +81,7 @@
     <Resource Include="images\FancyZonesEditor.ico" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\..\..\..\common\interop\PowerToysInterop.vcxproj" />
     <ProjectReference Include="..\..\..\..\common\ManagedCommon\ManagedCommon.csproj" />
     <ProjectReference Include="..\..\..\..\common\Microsoft.PowerToys.Common.UI\Microsoft.PowerToys.Common.UI.csproj" />
   </ItemGroup>