FMOD.SoundGroup.FMOD_SoundGroup_GetNumPlaying C# (CSharp) Method

        private static extern RESULT FMOD_SoundGroup_GetNumPlaying      (IntPtr soundgroup, out int numplaying);
        [DllImport(VERSION.dll)]

 public RESULT getNumPlaying(ref int numplaying)
 {
     return(SoundGroup.FMOD_SoundGroup_GetNumPlaying(soundgroupraw, ref numplaying));
 }