private static extern AGLRendererInfo aglNextRendererInfo(AGLRendererInfo rend);
private static extern byte aglDescribeRenderer(AGLRendererInfo rend, int prop, out int value);
[DllImport(agl)] static extern byte aglDescribeRenderer(AGLRendererInfo rend, int prop, out int value);
private static extern void aglDestroyRendererInfo(AGLRendererInfo rend);
[DllImport(agl)] static extern void aglDestroyRendererInfo(AGLRendererInfo rend);
[DllImport(agl)] static extern AGLRendererInfo aglNextRendererInfo(AGLRendererInfo rend);
static extern AGLRendererInfo aglNextRendererInfo(AGLRendererInfo rend);
static extern void aglDestroyRendererInfo(AGLRendererInfo rend);