First Question

[Amremad]

can i make a function by .net then link this function with command lisp

run when the user write the command lisp ???? "like vba with vl-vbarun "

if yes - how can i start?

[arcticad]

http://through-the-interface.typepad.com/through_the_interface/2006/07/breathe_fresh_l.html

[chiefbraincloud]

Yes.  You define the command with the LispFunction attribute, then from lisp, you call it like any other lisp function.

As far as where to start, I suggest downloading the ObectARX SDK for the version of AutoCAD you will be working with, and looking at the .NET Developers Guide.

This is a decent start: http://through-the-interface.typepad.com/through_the_interface/2006/07/breathe_fresh_l.html

Edit: I see while I was digging around for the hyperlinks arcticad already gave you that one.

[Amremad]

But I don’t know where can I write the vb.net or c#.net code ,

I downloaded and installed objectARX object source but I don’t know how to start, and where 's it's interface editing code?

Can someone explain this subject simply plz

Sorry for my english

[Alexander.Rivilis]

DevTV and AutoCAD .NET Labs can help you: http://adndevblog.typepad.com/autocad/2012/05/devtv-autocad-net-labs.html

[dgorsman]

In that case, I would suggest getting a handle on VB or C# development first before attempting to program for AutoCAD - you will lose less hair that way.  Check out Visual Studio Express from Microsoft as your IDE.