/// <summary>
/// Creates a System.Delegate that can be used to call a GLU function, core or extension.
/// </summary>
/// <param name="name">The name of the GLU function (eg. "gluBuild2DMipmaps")</param>
/// <param name="signature">The signature of the GLU function.</param>
/// <returns>
/// A System.Delegate that can be used to call this GLU function, or null if the specified
/// function name did not correspond to an GLU function.
/// </returns>
private static Delegate LoadDelegate(string name, Type signature)
{
MethodInfo m = importsClass.GetMethod(name.Substring(3), BindingFlags.Static | BindingFlags.NonPublic);
return
(GL.GetExtensionDelegate(name, signature) ??
(m != null ? Delegate.CreateDelegate(signature, m) : null));
}