I'd love to know how can I get a notification on my app when Skype is receiving or making a new call. I've been trying to mess around with `NSDistributedNotificationCenter` notifications but I just can't get any from Skype. I've even tried this [answer](https://stackoverflow.com/questions/2983223/skype-mac-api-use-applescript-or-5-year-old-api) but without any success. 

Any ideas on how to achieve this?