When you activate LabVIEW as an ActiveX server, LabVIEW exports two classes: an application class and a virtual instrument class. The application class opens a reference to the virtual instrument class.
Complete the following steps to activate LabVIEW as an ActiveX server.
If you want to call a stand-alone application from an ActiveX automation client such as Visual Basic, you must enable the ActiveX server for the application when you build the application. To do so, place a checkmark in the Enable ActiveX server checkbox on the Advanced page of the Application Properties dialog box.