Safely check office preview handler

QuickLook.Plugin/QuickLook.Plugin.OfficeViewer/CLSIDRegister.cs

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+// Copyright © 2017-2025 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/>.
+
+using Microsoft.Win32;
+using System;
+using System.Diagnostics;
+
+namespace QuickLook.Plugin.OfficeViewer;
+
+internal static class CLSIDRegister
+{
+    public const string Office = "{84F66100-FF7C-4fb4-B0C0-02CD7FB668FE}";
+    public const string Visio = "{279D6C9A-652E-4833-BEFC-312CA8887857}";
+
+    public static string GetName(string clsid)
+    {
+        try
+        {
+            // Such as `Computer\HKEY_CLASSES_ROOT\CLSID\{84F66100-FF7C-4fb4-B0C0-02CD7FB668FE}`
+            string displayName = Registry.GetValue($@"HKEY_CLASSES_ROOT\CLSID\{clsid}", string.Empty, null)?.ToString();
+            return displayName;
+        }
+        catch (Exception e)
+        {
+            Debug.WriteLine("Error reading registry: " + e.Message);
+        }
+        return null;
+    }
+}