New to VB/VBA- AutoCAD session thru VB

[Anonymous]

Trying to start an AutoCAD session thru VB...
1- having MMapp as my AutoCAD.Application,
what is the difference between ...

Set MMapp = CreateObject("AutoCAD.Application")
Set MMapp = New AutoCAD.AcadApplication

2- how would I detect if a previous session
of AutoCAD is already running, so add a new
document in the running app,
MMapp.Documents.Add or .Open
instead of opening a brand new app.

if there are some samples, please post.

thanks
Mark

[Anonymous]

Don't forget to set a reference to AutoCAD

Dim acadApp As AcadApplication

On Error Resume Next

Set acadApp = GetObject(, "AutoCAD.Application")

If Err Then

  Err.Clear

  Set acadApp = CreateObject("AutoCAD.Application")

  If Err Then

    Exit Sub

  End If

End If

[Anonymous]

Very Helpful and to the point!
Thanks

"nobody" wrote in message
news:f127043.0@WebX.maYIadrTaRb...
> Don't forget to set a reference to AutoCAD
>
>
> Dim acadApp As AcadApplication
> On Error Resume Next
> Set acadApp = GetObject(, "AutoCAD.Application")
> If Err Then
> Err.Clear
> Set acadApp = CreateObject("AutoCAD.Application")
> If Err Then
> Exit Sub
> End If
> End If
>
>