struct McRx {
  enum DictIterType {
    kDictSorted = 0,
    kDictCollated = 1
  };
  enum Ordering {
    kLessThan = -1,
    kEqual = 0,
    kGreaterThan = 1,
    kNotOrderable = 2
  };
  enum AppMsgCode {
    kNullMsg = 0,
    kInitAppMsg = 1,
    kUnloadAppMsg = 2,
    kLoadDwgMsg = 3,
    kUnloadDwgMsg = 4,
    kInvkSubrMsg = 5,
    kCfgMsg = 6,
    kEndMsg = 7,
    kQuitMsg = 8,
    kSaveMsg = 9,
    kDependencyMsg = 10,
    kNoDependencyMsg = 11,
    kOleUnloadAppMsg = 12,
    kPreQuitMsg = 13,
    kInitDialogMsg = 14,
    kEndDialogMsg = 15,
    kSuspendMsg = 16
  };
  enum AppRetCode {
    kRetOK = 0,
    kRetError = 3
  };
};