How to get default playback device ID through winapi on C#?

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C#

audio

WinAPI

Hello!
I'd like to get a default audio device id through WinAPI with C#. I wish to save this ID (and volume also) for restoring it in the future in WinServer2012 and Windows8. As I googled it is possible with the following WinAPI function:

[DllImport("winmm.dll")]
static extern uint waveOutMessage(IntPtr deviceID, uint uMsg, ref uint dwParam1, ref uint dwParam2);

But I don't have any results with this function on WinServer2012. Did I code something wrong or this is impossible in my case?
Thank you.

What I have tried:

I've found an example to call following functions:

[DllImport("winmm.dll")]
static extern uint waveOutMessage(IntPtr deviceID, uint uMsg, IntPtr dwParam1, IntPtr dwParam2);

or

[DllImport("winmm.dll")]
static extern uint waveOutMessage(IntPtr deviceID, uint uMsg, ref uint dwParam1, ref uint dwParam2);

with a C# method:

string GetAudioOutput()
        {
            uint originalDeviceId = 0; //4
            uint newDeviceId = 0; //4
            uint DRVM_MAPPER_PREFERRED_GET = 0x2015;
            uint DRVM_MAPPER_PREFERRED_SET = 0x2016;
            int deviceId = 0; //-1

            IntPtr WAVE_MAPPER = new IntPtr(-1);
            uint ret = waveOutMessage(WAVE_MAPPER, DRVM_MAPPER_PREFERRED_GET, GCHandle.Alloc(originalDeviceId, GCHandleType.Pinned).AddrOfPinnedObject() , GCHandle.Alloc(newDeviceId, GCHandleType.Pinned).AddrOfPinnedObject() );
            //uint ret = waveOutMessage(WAVE_MAPPER, DRVM_MAPPER_PREFERRED_GET, ref originalDeviceId, ref newDeviceId);
            return deviceId.ToString() + originalDeviceId.ToString() + newDeviceId.ToString() + ret.ToString(); //I get 0000
        }