If all you need to do is use it in VBA, it's quite easy.
1) Use the "New ATL Object" button on the ARX toolbar.
2) Choose "Simple Object"
3) Enter a name for your COM class.
4) On the Attributes tab, check the Support ISupportErrorInfo box.
5) Hit ok.
6) Find the interface for your class in the Class View - has a different
icon from normal classes.
7) Right click to add methods, etc.
So implement whatever methods you want, and you should be ready to go. Now
when you load your ARX into AutoCAD, go to the VBA editor and add a
reference to your ARX (actually, it might already be added - i can't
remember). You can now make an instace of that class and use it.
-Rich
"Martin Schmid" wrote in message
news:40c05f64$1_3@newsprd01...
> I'm working on a C++ app (as an ARX) that I may want to be able to call
it's
> functions from VBA within Acad. I know very little about COM, but I think
I
> understand enough to know that I will need to use it. Can you offer any
> suggestions? Is there a 'COM for Dummies'?
>
> --
> Thanks,
> Martin Schmid, EIT, CCSA, MCDBA, MCSE
>
>
> "Justavian" wrote in message
> news:40c03eb4$1_2@newsprd01...
> > I'd like to have a COM interface that can wrap some functions in my app,
> and
> > i'd like for that interface to be called from, for example, a stand
alone
> VB
> > EXE. I must admit that i don't know a whole bunch about COM. That
being
> > said, i can very easily make a COM class that can be use via the VBA for
> > AutoCAD. But if i try to make an external VB app, it is never able to
> > instantiate my COM class. I assume this is because the COM class needs
to
> > be in the presence of AutoCAD, and my external app doesn't "know" that
> > AutoCAD is up and running.
> >
> > What do i need to do to expose COM classes from my ARX to external apps?
> >
> > Thanks!
> >
> > -Rich
> >
> >
>
>
