WebBrowser静音(静Flash声音及刷新出现的哒哒哒声音)

        static class NativeMethods
        {
            [DllImport("winmm.dll", EntryPoint = "waveOutSetVolume")]
            public static extern int WaveOutSetVolume(IntPtr hwo, uint dwVolume);

        }

调用：

NativeMethods.WaveOutSetVolume(IntPtr.Zero,音量大小)

windows7下测试通过，因为win7有增强型音量控制， 不清楚xp下行不行， 待会虚拟机上测试。



禁止webbrowser点击、刷新时出现的声音。 

 public static class UnmanagedCode
    {

        private const int FEATURE_DISABLE_NAVIGATION_SOUNDS = 21;
        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(int FeatureEntry, [MarshalAs(UnmanagedType.U4)] int dwFlags, bool fEnable);
        public static void DisableSound()
        {
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_PROCESS, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_IN_REGISTRY, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_LOCALMACHINE, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_INTRANET, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_TRUSTED, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_INTERNET, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_RESTRICTED, true);
        }
    }

调用： UnmanagedCode.DisableSound();

就可以了。