You can include MapStore in your application and interact with it via its JavaScript API

1. Create a map using the standard installation
2. Go to Share -> Embed
3. Copy the API html code and paste it in your application page

The map will now load inside your application

NOTE: If the map is using a Google Maps background you will have to provide your own API key.  
Add `&key=YOUR_API_KEY` in the <script> src value