this is probably super simple but can't find the answer:
(setq apr (vlax-ename->vla-object (entlast)));#<VLA-OBJECT IAcadRegion 000002c2d9920cb8>
(vla-put-Normal apr '(0.0 0.0 1.0)); error: ActiveX Server returned an error: Type mismatch
(vla-Update apr)