[DllImport("winmm.dll")]

public static extern int waveOutSetVolume(IntPtr h, uint dwVolume);

using System;

using System.Collections.Generic;

using System.Text;

using System.Runtime.InteropServices;

namespace VolumeControl

{

    public static class VolumeControl

    {

        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 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)]

        public 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);

    }

}