Doing it in VBA is possible, but not easy.
You have to create a class module that has an AcadDocument
member (declared using WithEvents), and then you would
need to create a container class that holds an array of the
former, one for each AutoCAD document that's open. The container
class would be responsible for managing the array, and adding
or removing documents as they're opened/closed (this is very
much like a Control Array in standard VB).
Then you have to write event handlers for the AcadDocument in
the contained class module, and have those delegate to another
event handler in the containing class, which can then fire a
'document changed' event at your client application.
A few people have done it (I've only done it in Delphi),
so you might want to search these newsgroups.
Another alternative is the DocumentManager class in
AcadX.arx (www.caddzone.com/acadx/acadx15.htm).
"Eric Stewart" wrote in message
news:C6F608323F3A5FD9B1E3D503205C362D@in.WebX.maYIadrTaRb...
> I am using a modeless dialog to manage my Layer States (thanks Joe and
> everyone else)
>
> Now I want the ListBox where I show the defined layer states to update
when
> I switch drawings.
>
> I am totally at a loss on this. Any help would be appreciated.
>
>
