From f094dccb888f39aa8947b5424054c6008d381bf6 Mon Sep 17 00:00:00 2001
From: dybai <bdy1234567@126.com>
Date: Wed, 7 Feb 2018 15:42:27 +0800
Subject: [PATCH] Silence the program

---
 Shadowin/Shadowin.cs | 72 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 69 insertions(+), 3 deletions(-)

diff --git a/Shadowin/Shadowin.cs b/Shadowin/Shadowin.cs
index 583e06a..5ddb205 100644
--- a/Shadowin/Shadowin.cs
+++ b/Shadowin/Shadowin.cs
@@ -9,14 +9,73 @@
 using Plusal.Windows;
 using Shadowin.Implement;
 using Shadowin.Properties;
-
+using System.Runtime.InteropServices;
+
 namespace Shadowin
 {
     public partial class Shadowin : Form
     {
+        public enum INTERNETFEATURELIST
+        {
+            FEATURE_OBJECT_CACHING = 0,
+            FEATURE_ZONE_ELEVATION = 1,
+            FEATURE_MIME_HANDLING = 2,
+            FEATURE_MIME_SNIFFING = 3,
+            FEATURE_WINDOW_RESTRICTIONS = 4,
+            FEATURE_WEBOC_POPUPMANAGEMENT = 5,
+            FEATURE_BEHAVIORS = 6,
+            FEATURE_DISABLE_MK_PROTOCOL = 7,
+            FEATURE_LOCALMACHINE_LOCKDOWN = 8,
+            FEATURE_SECURITYBAND = 9,
+            FEATURE_RESTRICT_ACTIVEXINSTALL = 10,
+            FEATURE_VALIDATE_NAVIGATE_URL = 11,
+            FEATURE_RESTRICT_FILEDOWNLOAD = 12,
+            FEATURE_ADDON_MANAGEMENT = 13,
+            FEATURE_PROTOCOL_LOCKDOWN = 14,
+            FEATURE_HTTP_USERNAME_PASSWORD_DISABLE = 15,
+            FEATURE_SAFE_BINDTOOBJECT = 16,
+            FEATURE_UNC_SAVEDFILECHECK = 17,
+            FEATURE_GET_URL_DOM_FILEPATH_UNENCODED = 18,
+            FEATURE_TABBED_BROWSING = 19,
+            FEATURE_SSLUX = 20,
+            FEATURE_DISABLE_NAVIGATION_SOUNDS = 21,
+            FEATURE_DISABLE_LEGACY_COMPRESSION = 22,
+            FEATURE_FORCE_ADDR_AND_STATUS = 23,
+            FEATURE_XMLHTTP = 24,
+            FEATURE_DISABLE_TELNET_PROTOCOL = 25,
+            FEATURE_FEEDS = 26,
+            FEATURE_BLOCK_INPUT_PROMPTS = 27,
+            FEATURE_ENTRY_COUNT = 28
+        }
+
         private const int SizeDifference = 15;
         private const double OpacityDifference = 0.1;
-        private readonly Uri BlankUrl = new Uri("about:blank");
+        private readonly Uri BlankUrl = new Uri("about:blank");
+
+        private uint _savedVolume = 0;
+
+        private const int SET_FEATURE_ON_THREAD = 0x00000001;
+        private const int SET_FEATURE_ON_PROCESS = 0x00000002;
+        private const int SET_FEATURE_IN_REGISTRY = 0x00000004;
+        private const int SET_FEATURE_ON_THREAD_LOCALMACHINE = 0x00000008;
+        private const int SET_FEATURE_ON_THREAD_INTRANET = 0x00000010;
+        private const int SET_FEATURE_ON_THREAD_TRUSTED = 0x00000020;
+        private const int SET_FEATURE_ON_THREAD_INTERNET = 0x00000040;
+        private const int SET_FEATURE_ON_THREAD_RESTRICTED = 0x00000080;
+
+        [DllImport("urlmon.dll")]
+        [PreserveSig]
+        [return: MarshalAs(UnmanagedType.Error)]
+        static extern int CoInternetSetFeatureEnabled(
+          INTERNETFEATURELIST FeatureEntry,
+          [MarshalAs(UnmanagedType.U4)] int dwFlags,
+          bool fEnable);
+
+        [DllImport("winmm.dll")]
+        public static extern int waveOutGetVolume(IntPtr h, out uint dwVolume);
+
+        [DllImport("winmm.dll")]
+        public static extern int waveOutSetVolume(IntPtr h, uint dwVolume);
 
         #region 属性
 
@@ -45,9 +104,16 @@ public Shadowin()
             InitializeComponent();
 
             this.Initialize();
+
+            // Silence the program
+            CoInternetSetFeatureEnabled(INTERNETFEATURELIST.FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_PROCESS, true);
+            waveOutGetVolume(IntPtr.Zero, out _savedVolume);
         }
         ~Shadowin()
-        {
+        {
+            // restore the volume
+            waveOutSetVolume(IntPtr.Zero, _savedVolume);
+
             this.Close();
         }