v0.4: mic tray icon from mmres.dll, version in form title

Robovoice.App/IconExtractor.cs

@@ -0,0 +1,56 @@
+using System.Runtime.InteropServices;
+
+namespace Robovoice.App;
+
+internal static class IconExtractor
+{
+    private const string Source = @"%SystemRoot%\System32\mmres.dll";
+    private static readonly int[] CandidateIndices = { 5, 12 };
+
+    public static Icon? TryExtractMicrophone(int size = 32)
+    {
+        string path = Environment.ExpandEnvironmentVariables(Source);
+        if (!File.Exists(path)) return null;
+
+        foreach (int index in CandidateIndices)
+        {
+            if (ExtractIconAt(path, index, size, size) is { } icon)
+                return icon;
+        }
+        return null;
+    }
+
+    private static Icon? ExtractIconAt(string path, int index, int width, int height)
+    {
+        IntPtr[] hicons = new IntPtr[1];
+        IntPtr[] ids = new IntPtr[1];
+
+        int count = PrivateExtractIcons(path, index, width, height, hicons, ids, 1, 0);
+        if (count <= 0 || hicons[0] == IntPtr.Zero) return null;
+
+        try
+        {
+            return Icon.FromHandle(hicons[0]);
+        }
+        catch
+        {
+            DestroyIcon(hicons[0]);
+            return null;
+        }
+    }
+
+    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
+    private static extern int PrivateExtractIcons(
+        string lpszFile,
+        int nIconIndex,
+        int cxIcon,
+        int cyIcon,
+        IntPtr[] phicon,
+        IntPtr[] phiconId,
+        int nIcons,
+        int flags);
+
+    [DllImport("user32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool DestroyIcon(IntPtr hIcon);
+}

Robovoice.App/MainForm.cs

@@ -29,6 +29,7 @@ internal sealed partial class MainForm : Form
         _config = AppConfig.Load();
         Directory.CreateDirectory(AppConfig.AppDataDir);
         Directory.CreateDirectory(_voicesDir);
+        Text = $"Robovoice {AppVersion}";
         Load += OnLoad;
         FormClosing += OnFormClosing;
     }
@@ -426,12 +427,26 @@ internal sealed partial class MainForm : Form
         if (_trayInit) return;
         _trayInit = true;
 
+        var micIcon = IconExtractor.TryExtractMicrophone();
+        if (micIcon is not null)
+        {
+            _trayIcon = new NotifyIcon
+            {
+                Icon = micIcon,
+                Text = $"Robovoice {AppVersion}",
+                Visible = true,
+            };
+            Icon = micIcon;
+        }
+        else
+        {
             _trayIcon = new NotifyIcon
             {
                 Icon = SystemIcons.Application,
-            Text = "Robovoice",
+                Text = $"Robovoice {AppVersion}",
                 Visible = true,
             };
+        }
 
         var menu = new ContextMenuStrip();
         menu.Items.Add("Show", null, (_, _) => ShowWindow());
@@ -444,6 +459,9 @@ internal sealed partial class MainForm : Form
         _trayIcon.DoubleClick += (_, _) => ShowWindow();
     }
 
+    private static string AppVersion =>
+        typeof(MainForm).Assembly.GetName().Version?.ToString() ?? "0.0";
+
     private void OnResize(object? sender, EventArgs e)
     {
         if (WindowState == FormWindowState.Minimized && chkMinimizeToTray.Checked)

Robovoice.App/Robovoice.App.csproj

@@ -17,6 +17,7 @@
     <Nullable>enable</Nullable>
     <UseWindowsForms>true</UseWindowsForms>
     <ImplicitUsings>enable</ImplicitUsings>
+    <Version>0.4.0</Version>
   </PropertyGroup>
 
 </Project>