Hello, I'm writing an Addin for Inventor Professional 2015 in VB.Net, I'm attempting to export an assembly or part file from Inventor into a DWG format. This conversion isn't at all difficult, however I would like to attempt and assign an AutoCad layer to the DWG on export from Inventor. I have spend a few days researching and came up with two possible scenarios, unless anyone has insight on a proper/better solution. Option 1: Export the DWG with a custom outDWG.ini file, I could then maybe use different Autocad templates to assign the DWG a layer. (Everything in a single DWG will go on a single layer) Option 2: I found dwgdotnet where I may be able to use Autocad VB classes without the need of launching the Autocad process in any way. Imports Autodesk.AutoCAD Imports Autodesk.AutoCAD.ApplicationServices Imports Autodesk.AutoCAD.DatabaseServices Imports Autodesk.AutoCAD.Geometry Imports Autodesk.AutoCAD.Runtime If anyone could offer some suggestions or advice on how to proceed, Essentially - I want to export a DWG while assigning an Autocad layer at the same time to the file. I would greatly appreciate any help and advice. Thanks, Allen