BrightSign Object Reference Manual (FW 5.1) - Manual (Page 13)

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4. If multiple event types are possible, your script should determine which event the wait function received, then
process it. The script then jumps back to the wait.
An event can be generated by any BrightScript Object. For example, the class roControlPort sends events of type
roControlDown and roControlUp. The roControlDown implements the ifInt interface, which allows access to an integer. An
event loop needs to be aware of the possible events it can receive and be able to process them.
BrightSign Object Library
The following chapters provide definitions for objects that can be used in BrightScript. A brief description, a list of
interfaces, and the member functions of the interfaces are provided for each object class.
While most BrightScript objects have self-contained sections in this chapter, some objects are grouped in the same
section if they are closely related or depend on one another for functionality.