The default bidirectional attributes word of the presentation space is set at the time the PS is created by inheriting the process bidirectional attributes word.
Note that for normal and micro presentation spaces, the process bidirectional attributes are inherited when the device context is created, so setting the process bidirectional attribute must be done before the device context is created in order to affect the presentation space which is associated with it.
This function is used to dynamically change the setting of the bidirectional attributes of a GPI PS, thus affecting the Bidirectional text conversions that are performed by GPI.