public static extern int mpg123_param(IntPtr mh, mpg123_parms type, Int32 value, double fvalue);
public static extern int mpg123_getparam(IntPtr mh, mpg123_parms type, IntPtr val, IntPtr fval);
[DllImport(Mpg123Dll)] public static extern int mpg123_getpar(IntPtr mp, mpg123_parms type, IntPtr val, IntPtr fval);
[DllImport(Mpg123Dll)] public static extern int mpg123_par(IntPtr mp, mpg123_parms type, Int32 value, double fvalue);
public static extern int mpg123_getpar(IntPtr mp, mpg123_parms type, IntPtr val, IntPtr fval);
public static extern int mpg123_par(IntPtr mp, mpg123_parms type, Int32 value, double fvalue);