The key to building virtual applications is the addition of post-processing functions or filters to mobile applications. Post-processing functions can either transform a mobile application's content (for example, render the content as a chart), or create events. You can add more than one post-processing function to handle a mobile application's content and configure the order in which the post-processing occurs. When you use multiple post-processing functions, each function operates on the output of the previous function--similar to a Pipes and Filters design.

Pipes and Filters is a design architecture where the components are known as filters and the connectors are the pipes. Filters read input data, perform some computation or transformation on the data, and produce output data. Pipes serve as conduits for the data streams, passing outputs from one filter to the inputs of another filter.

You can access post-processing options a number of ways, including right-clicking a mobile application and selecting Add Post Processing | name, where name is the name of the post processing option you are adding: