PyCStatusBarCtrl = GetStatusBarCtrl()
Gets the statusbar control object for the statusbar.
MFC References
CStatusBar::GetStatusBarCtrl
Note that below we take the address of rTBC because it's a reference and not a pointer
and ui_assoc_object::make expects a pointer.
We need to create a new class and not do a map lookup because in MFC CToolBarCtrl is
simply a casted CToolBarCtrl (afxext.inl) so the lookup will return the PyCToolBar object
which will fail the type tests.