8. In an interactive processing system having a function for outputting a help message, a help control system comprising: a message database for storing help messages; a rule database for storing inference rules; means for obtaining through use of a user program at least a history of past statuses resulting from execution of commands by said user program; means for applying inference rules, stored in said rule database, to said history of past statuses for selecting help messages, each of said inference rules being related to a relationship between a status of said user program and a help message to be outputted; and means for outputting, from help messages stored in said message database, a help message selected on the basis of a result of operation of said applying means.
8. In an interactive processing system having a function for outputting a help message, a help control system comprising: a message database for storing help messages; a rule database for storing inference rules; means for obtaining through use of a user program at least a history of past statuses resulting from execution of commands by said user program; means for applying inference rules, stored in said rule database, to said history of past statuses for selecting help messages, each of said inference rules being related to a relationship between a status of said user program and a help message to be outputted; and means for outputting, from help messages stored in said message database, a help message selected on the basis of a result of operation of said applying means. 10. A help control system according to claim 8, wherein said inference rules are applied to a current status and said history of past statuses of said user program in said applying means.