The vlax-ename->vla-objectfunction allows you to convert entity names (enames) obtained through functions, such as entget, to VLA-objects you can use with ActiveX functions. For example, the following code sets a variable to an ename, then uses vlax-ename->vla-object to convert the ename to a VLA-object:
(setq ename-circle (car (entsel "\nPick a Circle:"))) <Entity name: 27f0538> (setq vlaobject-circle (vlax-ename->vla-object ename-circle)) #<VLA-OBJECT IAcadCircle 03642c24>
To convert VLA-objects to enames, use vlax-vla-object->ename . For example:
(setq new-ename-circle (vlax-vla-object->ename vlaobject-circle)) <Entity name: 27f0538>