Working with Data Structures and Subforms

Subforms are self-contained; the elements within it cannot be accessed by other subforms or the form. Therefore, to communicate with each other, each subform must present an interface that can be used to pass data into and out of the subform. The interface is presented as a data structure and performs similarly to form and report interconnects. When developing event rules, the data structure items will appear as variable type subform interconnection (SI).