Creates a new ProgressBar object; can also be called as
PARENT->AddProgressBar(%OPTIONS). Class specific %OPTIONS
are:
-smooth => 0/1 (default 0) uses a smooth bar instead of the default segmented bar. -vertical => 0/1 (default 0) display progress status vertically (from bottom to top).
Sets the position of the ProgressBar to the specified VALUE.
Sets the range of values (from MIN to MAX) for the ProgressBar; if MIN is
not specified, it defaults to 0.
Sets the increment value for the ProgressBar; see StepIt().
Increments the position of the ProgressBar of the defined step value; see SetStep().