Methods

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

A method is an operation that an object can be requested to perform on itself.

A method is identified with a string.

Any class defines its own methods.

A method is applied on an object with:

• DoMethod() or CoerceMethod(), that apply 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]).