RegistryKey LocaIMachine = Registry.LocalMachine;
                RegistryKey MyPrograrm = LocaIMachine.CreateSubKey("SOFTWARE\\Autodesk\\AutoCAD\\R20.1\\ACAD-F001:804\\Applications\\name", true);
                MyPrograrm.SetValue("DESCRIPTION", desc, RegistryValueKind.String);//描述
                MyPrograrm.SetValue("LOADCTRLS", 2, RegistryValueKind.DWord);//cad啟動後自動載入
                MyPrograrm.SetValue("LOADER", dpath, RegistryValueKind.String);//dll的全路徑
                MyPrograrm.SetValue("MANAGED", 1, RegistryValueKind.DWord);