How to Create a Class in LabVIEW (OOPs)

You create user-defined data types in LabVIEW by creating LabVIEW classes. LabVIEW classes define data associated with an object, as well as the methods that define the actions you can perform on the data. The benefits of encapsulation and inheritance allow you to create modular code that is easy to change without affecting code throughout the application.

In LabVIEW, the data of a class is private, which means only VIs that are members of the class can access the data. You define the data of the class in the private data control. When you create and save a LabVIEW class, LabVIEW creates a class library file (.lvclass) that defines a new data type. The class library file records the private data control and information about any member VIs you create, such as a list of the VIs and various properties of the VIs. The class library is similar to the project library (.lvlib). However, the class library defines a new data type.

The private data control is a unique class library file that defines a cluster of data for the new data type and is the data on the class wire. LabVIEW does not save the private data control on disk. Instead, LabVIEW saves it inside the class library file. Saving the private data control inside the class library file allows LabVIEW to ensure that you never use the wrong private data with the class definition.


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