Object-oriented programming allows procedures about objects to be created whose exact type is not known until runtime. For example, a screen cursor may change its shape from an arrow to a line ...

Before Object Oriented Programming. One of the easiest ways to understand what is meant by ‘object oriented’, is to define what it is not.Before Object Oriented Programming (OOP) programs were ...

An object must be a component in a FRAME entry or a variable that is declared as an Object type in the SCL program. Automatic system variables like _SELF_ are declared internally as Object type, so ...

Events occur when a user action takes place (such as a mouse click), when an attribute value is changed, or when a user-defined condition occurs. Events are essentially generic messages that are sent ...