public static extern void gluGetTessProperty_1( IntPtr tess, TessellationProperty which, out TessellationWinding value);
public static extern void gluGetTessProperty_2( IntPtr tess, TessellationProperty which, [MarshalAs(UnmanagedType.U8)] out bool value);
public static extern void gluGetTessProperty( IntPtr tess, TessellationProperty which, out double value);