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The driver routine performs the physical manipulation of the component for Deltanji. Each time Deltanji needs to copy, delete or otherwise access a component, it calls the appropriate function in the component driver routine. Each function is simple and can be written directly in the M programming language.

A programmer can create a customized component driver to handle components in ways other than those provided by the standard Deltanji component drivers. In order for Deltanji to recognize the new driver, an entry must be set-up in the component driver table. A one to three-character uppercase code should be used to identify the new component type and a routine created whose name begins %vc1x and is followed by the component type code. For example, a new component type ABC requires a component driver named %vc1xABC. A number of functions with standard line labels must be incorporated into the component driver.