How to pass Mashup Parameters WITHOUT using the Navigation widget?

[bitentf]

I'm creating a Thingworx Navigate custom app and need to pass Mashup Parameters to a custom Search mashup using a url. The approach I'm trying to take is similar to what's done by PTC's OOTB Thingworx Navigate Apps... so, once my custom app is selected in the Thingworx Navigate "home page", it would pass some parameters to a Search Mashup.

The issue is that (I think) I can not use the "Navigation" widget for that because the Search Mashup is not called from another "mashup" that I own... it's called from the LandingPageAccessAppMashup (the "home page" of the Thingworx Navigate Apps).

[Sathishkumar_C]

may use session variable.

[bitentf]

Since the value will change during a single session (people will select different apps in a single session), how can I find out which action/event/service gets triggered once I click on the Navigate Custom App so I can update the session variable?