TreeTable writable fields.

Hello fellow Custom IC SKILLers,

I have yet another question. 

I saw in ADE L that in the "Model Library Setup" AppForm you are able to write in the fields. And even I think the fields could be other type of fields - fileSelector, Combo and so on.

My question here is if it is possible for the mortals too, or that's another ADE thing only. When I get the form ID and ask about the fields there is a "fieldType->native". As I haven't seen such fields I presume it's another ADE only feature. 

Thank you

Stoyan