Upload FastSeekWpf/App.xaml.cs

FastSeekWpf/App.xaml.cs

@@ -14,7 +14,7 @@ public partial class App : Application
     private const string MutexName = "FastSeekWpf_SingleInstance_Mutex";
     private const uint WM_TOGGLE_WINDOW = Win32Api.WM_USER + 3;
     private Mutex? _mutex;
-    private bool _shutdown;
+    private volatile bool _shutdown;
     private MainWindow? _mainWindow;
     private Thread? _hotkeyThread;
 
@@ -24,7 +24,7 @@ public partial class App : Application
         _mutex = new Mutex(true, MutexName, out bool createdNew);
         if (!createdNew)
         {
-            IntPtr hwnd = Win32Api.FindWindowW("FastSeekWpf_MainWindow", null);
+            IntPtr hwnd = Win32Api.FindWindowW(null, "FastSeek");
             if (hwnd != IntPtr.Zero)
                 Win32Api.PostMessageW(hwnd, WM_TOGGLE_WINDOW, IntPtr.Zero, IntPtr.Zero);
             Shutdown();
@@ -59,7 +59,10 @@ public partial class App : Application
 
         // Register Alt+Space (MOD_ALT=0x0001, VK_SPACE=0x20)
         if (!Win32Api.RegisterHotKey(IntPtr.Zero, 1, 0x0001, 0x20))
+        {
+            Debug.WriteLine($"RegisterHotKey failed: {Marshal.GetLastWin32Error()}");
             return;
+        }
 
         try
         {