安装向导
https://www.cnblogs.com/loveclumsybaby/p/12380881.html
SDK:
http://download.autodesk.com/us/support/autocad_plant_3d/autocad_plant_3d_2020_sdk_english_win_64bit_dlm.sfx.exe
解压SDK到非中文目录，如 sdk
设置相关信息
https://www.cnblogs.com/arxive/p/10506520.html
https://github.com/ADN-DevTech/AutoCAD-Net-Wizards/tree/ForAutoCAD2020
原文：https://www.cnblogs.com/loveclumsybaby/p/C2R.html