Welcome to the community…
This should be simple to accomplish.
Here is a very basic example that I found: SmartThings XBMC Home Theater Integration
I hate to be that guy 
but I recommend you head over to http://docs.smartthings.com/en/latest/index.html.
Once you figure out how to navigate around the docs it’s not too hard to find most of what you need there to get started.
We will be here if you need us after that.