Play sounds parallel with DirectSound (1 Viewer)

[Michael.K]

How i can do this? i need window handel but where i can find it?
this class of page inherited from GUIWindow

 Device dSound;
                        dSound = new Device();
                        dSound.SetCooperativeLevel(NEED_HANDEL, CooperativeLevel.Priority);
                        var sounddevice = new Device();
                        SecondaryBuffer soundd;
                        BufferDescription d = new BufferDescription();
                        // Set descriptor’s flags
                        d.ControlPan = true;
                        d.ControlVolume = true;
                        d.ControlFrequency = true;
                        d.ControlEffects = true;
 
                        soundd = new SecondaryBuffer(@"c:\incoming_call.wav", d, dSound);
                        soundd.Volume = 0;
                        soundd.Play(0, BufferPlayFlags.Looping);

sound not play.