I am considering building an app in C++ that will be parsing text from the web and create some statistical results. These results I want to be fed in an external app in real time. The external app (to whose code I have no access, but can ask for a - paid - custom made addition) will then need some code to read and use these results.

I am wondering what would be the best way to interconnect the two apps, in terms of speed and ease of implementation. I am considering :

 disk I/O (slow) 

 a Windows service  

 a DLL  

 a web service  

 a web page

Perhaps I am missing a better solution ? Thank you.