This class allows platforms to implement functionality to optimise GDI objects, such as wxPen, wxBrush and wxFont. On Windows, the underling GDI objects are a scarce resource and are cleaned up when a usage count goes to zero. On some platforms this class may not have any special functionality.
Since the functionality of this class is platform-specific, it is not documented here in detail.
wxPen, wxBrush, wxFont