  In file included from ChildFrm.cpp:7:
./MFCApplication4.h(10,10): : warning : non-portable path to file '"Resource.h"'; specified path differs in case from file name on disk [-Wnonportable-include-path]
  #include "resource.h"       // main symbols
           ^~~~~~~~~~~~
           "Resource.h"
ChildFrm.cpp(19,1): : warning : unused typedef 'ThisClass' [-Wunused-local-typedef]
  BEGIN_MESSAGE_MAP(CChildFrame, CMDIChildWndEx)
  ^
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\atlmfc\include\afxwin.h(1262,20): note: expanded from macro 'BEGIN_MESSAGE_MAP'
                  typedef theClass ThisClass;                                                \
                                   ^
  2 warnings generated.
  In file included from ClassView.cpp:7:
./MFCApplication4.h(10,10): : warning : non-portable path to file '"Resource.h"'; specified path differs in case from file name on disk [-Wnonportable-include-path]
  #include "resource.h"       // main symbols
           ^~~~~~~~~~~~
           "Resource.h"
ClassView.cpp(53,43): : error : call to non-static member function without an object argument
          ON_COMMAND(ID_CLASS_ADD_MEMBER_FUNCTION, OnClassAddMemberFunction)
                                                   ^~~~~~~~~~~~~~~~~~~~~~~~
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\atlmfc\include\afxmsg_.h(269,26): note: expanded from macro 'ON_COMMAND'
                  static_cast<AFX_PMSG> (memberFxn) },
                                         ^~~~~~~~~
ClassView.cpp(54,43): : error : call to non-static member function without an object argument
          ON_COMMAND(ID_CLASS_ADD_MEMBER_VARIABLE, OnClassAddMemberVariable)
                                                   ^~~~~~~~~~~~~~~~~~~~~~~~
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\atlmfc\include\afxmsg_.h(269,26): note: expanded from macro 'ON_COMMAND'
                  static_cast<AFX_PMSG> (memberFxn) },
                                         ^~~~~~~~~
ClassView.cpp(55,34): : error : call to non-static member function without an object argument
          ON_COMMAND(ID_CLASS_DEFINITION, OnClassDefinition)
                                          ^~~~~~~~~~~~~~~~~
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\atlmfc\include\afxmsg_.h(269,26): note: expanded from macro 'ON_COMMAND'
                  static_cast<AFX_PMSG> (memberFxn) },
                                         ^~~~~~~~~
ClassView.cpp(56,34): : error : call to non-static member function without an object argument
          ON_COMMAND(ID_CLASS_PROPERTIES, OnClassProperties)
                                          ^~~~~~~~~~~~~~~~~
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\atlmfc\include\afxmsg_.h(269,26): note: expanded from macro 'ON_COMMAND'
                  static_cast<AFX_PMSG> (memberFxn) },
                                         ^~~~~~~~~
ClassView.cpp(57,28): : error : call to non-static member function without an object argument
          ON_COMMAND(ID_NEW_FOLDER, OnNewFolder)
                                    ^~~~~~~~~~~
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\atlmfc\include\afxmsg_.h(269,26): note: expanded from macro 'ON_COMMAND'
                  static_cast<AFX_PMSG> (memberFxn) },
                                         ^~~~~~~~~
ClassView.cpp(60,68): : error : call to non-static member function without an object argument
          ON_COMMAND_RANGE(ID_SORTING_GROUPBYTYPE, ID_SORTING_SORTBYACCESS, OnSort)
                                                                            ^~~~~~
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\atlmfc\include\afxmsg_.h(277,4): note: expanded from macro 'ON_COMMAND_RANGE'
                  (memberFxn)) },
                   ^~~~~~~~~
ClassView.cpp(61,78): : error : call to non-static member function without an object argument
          ON_UPDATE_COMMAND_UI_RANGE(ID_SORTING_GROUPBYTYPE, ID_SORTING_SORTBYACCESS, OnUpdateSort)
                                                                                      ^~~~~~~~~~~~
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\atlmfc\include\afxmsg_.h(304,4): note: expanded from macro 'ON_UPDATE_COMMAND_UI_RANGE'
                  (memberFxn)) },
                   ^~~~~~~~~
  1 warning and 7 errors generated.
