Add manual launch message

Author: tanchekwei

WorkspaceLauncherForVSCode/Classes/NativeDialog.cs

@@ -0,0 +1,20 @@
+// Modifications copyright (c) 2025 tanchekwei
+// Licensed under the MIT License. See the LICENSE file in the project root for details.
+using System;
+using System.Runtime.InteropServices;
+namespace WorkspaceLauncherForVSCode.Classes;
+
+public static class NativeDialog
+{
+    public static void Show(string title, string message)
+    {
+        _ = MessageBoxW(IntPtr.Zero, message, title, 0);
+    }
+
+    [DllImport("user32.dll", CharSet = CharSet.Unicode)]
+    private static extern int MessageBoxW(
+        IntPtr hWnd,
+        string text,
+        string caption,
+        uint type);
+}

WorkspaceLauncherForVSCode/Program.cs

@@ -35,7 +35,10 @@ public static void Main(string[] args)
             }
             else
             {
-                Console.WriteLine("Not being launched as a Extension... exiting.");
+                string productName = Constant.VisualStudioCodeDisplayName;
+                NativeDialog.Show(
+                    productName,
+                    $"{productName} is a PowerToys Command Palette extension.\n\nInstall and enable PowerToys Command Palette,\n\nthen open {productName} extension from Command Palette.");
             }
         }
         catch (Exception ex)