I am using vb.net 2003. to open an autocad session. I have Acad 2002, 2004, & 2005 loaded in my system however in the referance -> add referance i can see only AutoCAD 2000 object library AutoCAD 2000 Type Library AutoCAD 2005 Type Library. and not autocad 2004. However, it opens AUtoCAD 2004, everytime. My questions are: 1. Where does it pick AutoCAD 2004 referance 2. I want it to open always the latest version has someone got some code for that please (old VB6 code will also work) TIA Irfan