TextSections, DocInfo etc in LO Base Forms

I had the impression that LO Base Forms are actually writer documents.
They behave mostly like that.

But then I tried to access text sections with a macro, and

ThisComponent.TextSections throws a "Property or method not found:
TextSections".

Same happens with DocInfo (document variables)

I can insert sections with Insert | Section... and hide/show them with
Format|Sections... , but how can I access them with Macros? Can I?

best
Arno