Methods

A method is an action that can be made on a object.

Objects are black boxes, so you communicate with them via methods.

A method is identified with a string.

Any class defines its own methods.

A method is applied on an object with:

• DoMethod(), that applies the method directly and immediately
• Notify(), that applies the method on an object when an attribute of another object changes

A method is called:

• direct - if it can be used in a DoMethod() call, e.g. REMOVE method of List class is direct
• indirect - if it can be used in a Notify() call, e.g. SORT method of List class is indirect

A method can be both direct and indirect, e.g. SORT method of List class is both direct and indirect, or can be only direct, e.g. INPUTBUFFERED method of Application class is direct but not indirect, or can be only indirect, e.g. SET method is indirect only.
It means that

    res=Notify("button","pressed",0,"app","INPUTBUFFERED")

is not legal (res is 72 [METHOD_NONOTIFY]).

and that

    res = DoMethod("status","set","contents","hello world")

is not legal (res is 71 [METHOD_NOTIFY_ONLY]).