I just posted some sample Add-Ins to my Github site: https://github.com/DaveBrumbaugh/MostOfDavesClasses-CSharp-Wrappers-For-ProjectWise/tree/master/Samples/MSCE-AddIns
You'll need MostOfDavesClasses.cs from the root of the site to build them. The samples are: SetPWVarsCE (adds your ProjectWise document general properties and custom attributes as configuration variables in your current session), PolyhedraCE (an update of my old Polyhedra example for CE), and QRCodeAddInForMSCE which creates a QR Code cell which you can place in your drawing. Pass the URL you want to encode on the command line. It's a pretty good Primitive placement example I think.
Yes Dave Brumbaugh thank you very much for your contributions that I make mention of on the Project Delivery > ProjectWise Programming page.
Happy Holidays all!Bob