With "frontend" you mean the application that handles the data?

You could use a custom url such as myapplication://open-form?reference=123

Then you need to register your application as the handler for that kind of URL and make it handle calls to open the appropriate form with the requested data.

Not easy...

Here's some documentation: http://msdn.microsoft.com/en-us/library/ie/aa767914(v=vs.85).aspx