Adding a context menu in Universal GUI

For our projects we use a lot of tasks that are simultaniously displayed on the user's screen.

To clean up our application we would like to use a contextmenu in the Universal GUI, like the contextmenu in the Windows GUI.

We would like the addition of a contextmenu in the Universal GUI, to make tasks available in the contextmenu so we can  clean up the rest of the application, and to use the extra functionality that comes with the contextmenu.