No can do. Corporate policy I'm not an IT

I believe I need at least VS Express

Thank you for the replay.

Unfortunately, we can use only API that comes with the software. So, we are stuck with VBA and Lisp

is there COM or lisp equivalent to vla-get-summaryInfo.
I need to set and get Custom DWG Properties

(setq doc(vla-get-activedocument(vlax-get-acad-object)))
(vla-get-summaryInfo doc)

filter 66 doesn't work for some reason.
(command "ERASE"(ssget "x" '((0 . "INSERT")(66 . 1))) "")
is it a bug?