automatically create dxf

Hi Everyone,

I was wondering if anyone could suggest an automated method of
creating an environment from two dxf files and then exporting the
combined environment as another dxf file using autocad from an
external program written in VB or using VBA.


Many thanks,


John.

 

Because the process has to be fully automated as I have two constantly
changing input dxf files which have to be combined and fed into
another program (not AutoCad) which cannot do the combining...

 

Hi Bob

Many thanks for the suggestion. I am totally new to AutoCAD and the
dxf file format. I had a look at the dxf files created by the other
software and they seems really complex. I am hoping that AutoCAD will
do the work for me by performing the following simple tasks using VB6:
Open AutoCAD -> Import the two dxf files -> export the combined plot
into another dxf file. Using VB I have managed to open an a new .dwt
file. When I try using the following code to load a .dxf file nothing
happens:

Private Sub Command1_Click()
Dim AcadDoc As AcadDocument
Dim acadApp As AcadApplication

Set acadApp = GetObject(, "AutoCAD.Application")
Set AcadDoc = Application.Documents.Add("acad.dwt")
acadApp.Visible = True

Dim insPnt(0 To 2) As Double

insPnt(0) = 2
insPnt(1) = 2
insPnt(2) = 2

Set AcadDoc = acadApp.ActiveDocument.Import("c:\Drawing1.dxf",
insPnt, 1)

End Sub

There are no error messages and AutoCAD opens fine, its just the
content of the drawing is not displayed. Can't figure out what is
going on.

John.