PtToolbarGroup documentation?

I’m trying to use the PtToolbarGroup widget but am unable to do the
simplest things like resize. This occurs while using PhAB in
conjunction with Momentics in 6.3 SP1 Pro.

The online documentation is sparse and doesn’t seem to agree with what
happens when I instantiate a PtToolbarGroup widget. A search in the
OpenQNX GUI forum and this forum give no useful results. Has anyone
used PtToolbarGroup successfully? (Not to mention the difficulties
in getting plain, old PtToolbar to organize buttons in a natural