>>>I'd like to add a functionality to my app. That is to have an upgrade option. By selecting that upgrade option the newest version of my app would be downloaded and installed.
>>>
>>>Or perhaps it could be another app whose job would be to download and install the newest version.
>>>
>>>How do I accomplish that?
>>
>>Check UT download area. There're free and commercial solutions available.
>
>Thanks again.

For example,

Free - file #21770
Commercial - file #31025