Static calls
By default, PowerBuilder makes static lookups for functions and
events. This means that it identifies the function or event by matching
the name and argument types when it compiles the code. A matching
function or event must exist in the object at compile time.
Results of static calls
Static calls do not guarantee that the function or event
identified at compile time is the one that is executed. Suppose that you
define a variable of an ancestor type and it has a particular function
definition. If you assign an instance of a descendant object to the
variable and the descendant has a function that overrides the ancestor’s
function (the one found at compile time), the function in the descendant
is executed.