After you have created the application's ATD file(s), you must modify the setup program to run SMSADDIN.EXE.
smsaddin /u newapp.atd
If you are registering an application in more than one context, the setup program must include a separate SMSADDIN.EXE command line for each ATD file.
For deinstallations, specify the /u and /r options as well as the ATD file. This removes the application in unattended mode.
When run during setup, SMSADDIN.EXE checks the syntax of the input file and writes the Registry silently. If the data in the file is invalid, SMSADDIN.EXE displays a message box explaining the failed Registry update.