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! For the sake of simplifying things I will refer to Windows Store applications (also known as Metro or Modern UI) as "app" and to common desktop applications as "application" ! I believe this is still one of the most unclear yet important questions concerning app-development for developers who already have established applications on the market: How to manage communication between apps and applications on a Windows 8 system? (please let's not start a debate on principles - there're so many use cases where this is really required!) I basically read hundrets of articles in the last few days but still it remains unclear how to proceed doing it right from the first time. Mainly because I found several conflicting information. With my question here I'd like to re-approach this problem from the viewpoint of the final Windows 8 possibilities. Given situation: App and application run on same system 1:1 communication Application is native (written in Delphi) Administrator or if required even system privileges are available for the application In 90% of the use cases the app requests an action to be performed by the application and receives some textual result. The app shouldn't be left nor frozen for this! In 10% the application performs an action (triggered by some event) and informs the app - the result might be: showing certain info on the tile or in the already running and active app or if possible running the app / bringing it to the foreground. Now the "simple" question is, how to achieve this? Is local webserver access actually allowed now? (I believe it wasn't for a long time but now is since the final release) WCF? (-> apparently MS doesn't recommend that anymore ) HTTP requests on a

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