Error and exception handling routines
The routines described in this section fall into two main categories:
Those that allow interpretation of error codes returned by other routines.
Routines which fall into this category include ERR77 and DOS_ERROR_MESSAGE@.
Where a routine returns an error code it is of course always good practice to
check it for an acceptable value (usually zero).
Those that allow control over the action taken in the event of
a software-generated exception. Exception handling routines in this
section are currently for Win32 only. For information on handling .NET
exceptions see Handling exceptions.