void SetMasterVolumeLevel()

in Apps/EyeVolume/WinVolume.cs [78:134]
42 lines of code
1 McCabe index (conditional complexity)

        void SetMasterVolumeLevel(
            [In] [MarshalAs(UnmanagedType.R4)] float fLevelDB,
            [In] [MarshalAs(UnmanagedType.LPStruct)] Guid pguidEventContext);

        void SetMasterVolumeLevelScalar(
            [In] [MarshalAs(UnmanagedType.R4)] float fLevel,
            [In] [MarshalAs(UnmanagedType.LPStruct)] Guid pguidEventContext);

        [return: MarshalAs(UnmanagedType.R4)]
        float GetMasterVolumeLevel();

        [return: MarshalAs(UnmanagedType.R4)]
        float GetMasterVolumeLevelScalar();

        void SetChannelVolumeLevel(
            [In] [MarshalAs(UnmanagedType.U4)] uint nChannel,
            [In] [MarshalAs(UnmanagedType.R4)] float fLevelDB,
            [In] [MarshalAs(UnmanagedType.LPStruct)] Guid pguidEventContext);

        void SetChannelVolumeLevelScalar(
            [In] [MarshalAs(UnmanagedType.U4)] uint nChannel,
            [In] [MarshalAs(UnmanagedType.R4)]float fLevel,
            [In] [MarshalAs(UnmanagedType.LPStruct)]Guid pguidEventContext);

        void GetChannelVolumeLevel(
             [In] [MarshalAs(UnmanagedType.U4)] uint nChannel,
             [Out] [MarshalAs(UnmanagedType.R4)] out float level);

        [return: MarshalAs(UnmanagedType.R4)]
        float GetChannelVolumeLevelScalar([In] [MarshalAs(UnmanagedType.U4)] uint nChannel);        

        void SetMute(
            [In] [MarshalAs(UnmanagedType.Bool)] bool bMute, 
            [In] [MarshalAs(UnmanagedType.LPStruct)] Guid pguidEventContext);

        [return: MarshalAs(UnmanagedType.Bool)]
        bool GetMute();

        void GetVolumeStepInfo(
            [Out] [MarshalAs(UnmanagedType.U4)] out uint pnStep,
            [Out] [MarshalAs(UnmanagedType.U4)] out uint pnStepCount);

        void VolumeStepUp([In] [MarshalAs(UnmanagedType.LPStruct)] Guid pguidEventContext);

        void VolumeStepDown([In] [MarshalAs(UnmanagedType.LPStruct)] Guid pguidEventContext);

        [return: MarshalAs(UnmanagedType.U4)] // bit mask
        uint QueryHardwareSupport();

        void GetVolumeRange(
            [Out] [MarshalAs(UnmanagedType.R4)] out float pflVolumeMindB,
            [Out] [MarshalAs(UnmanagedType.R4)] out float pflVolumeMaxdB,
            [Out] [MarshalAs(UnmanagedType.R4)] out float pflVolumeIncrementdB);
    }

    class VolumeControl
    {