byte                Byte constants
 date                Date constants
 logical             Logical constants
 numeric             Numeric constants
 string              String literal constants
 __DATE__            Compilation date predefined macro
 __FILE__            Source file name predefined macro
 __FORCE__           Force version predefined macro
 __HDX__             MkHdr support predefined macro
 __LINE__            Source file line predefined macro
 __TIME__            Compilation time predefined macro