LabVIEW creates an application instance for each target in a LabVIEW project. When you open a VI from the Project Explorer window, the VI opens in the application instance for the target. LabVIEW also creates a main application instance, which contains open VIs that are not part of a project and VIs that you did not open from a project. You can select the application instance for a VI by using the application instance shortcut menu.
Complete the following steps to select an application instance for a VI.
You also can use the Application:Default:Application property to return the default application reference programmatically. Use the Application property to open the target application instance programmatically.