First of all, you don't specify which language your projects are programmed with. Next time you post a question please include the language in the tags.
I think what you'd want to do is create a web service.
Here[
^] is a google search for tutorials that may help get you started.
Here[
^] is a code project article that can walk you through a basic web service.
Basically once you have the web service you can call it from almost any where...a desktop app, a mobile app, a website, etc.
Hope this helps.
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