/**
@class wxMDIClientWindow
- @wxheader{mdi.h}
An MDI client window is a child of wxMDIParentFrame, and manages zero or
more wxMDIChildFrame objects.
/**
@class wxMDIParentFrame
- @wxheader{mdi.h}
An MDI (Multiple Document Interface) parent frame is a window which can contain
MDI child frames in its own 'desktop'. It is a convenient way to avoid window
/**
@class wxMDIChildFrame
- @wxheader{mdi.h}
An MDI child frame is a frame that can only exist on a wxMDIClientWindow,
which is itself a child of wxMDIParentFrame.