Help manipulation

Enter, delete or retrieve a help file

               +------------------------------------------+
               | CALL  CDHELP (LUN,CHFILE,PATH,CHOPT,IRC*) |
               +------------------------------------------+
                                  

LUN

Logical unit on which to read or write the help file

CHFILE

Character variable giving the file name

PATH

Character string specifying the path name of the help directory

CHOPT

Character variable specifying the options required.

'A'

File is already open on unit LUN

'D'

Delete the help information for the specified path name ( LUN ignored)

'P'

Print the help information for the specified path name If LUN is non-zero, then the information will be printed on this unit. Otherwise, IQPRNT will be used.

'R'

Read the help information from the specified logical unit and enter into the database

'W'

Write the help information for the specified path name onto the specified logical unit

IRC

Integer return code

0

Normal completion

66

Illegal logical unit number

182

Illegal path name

203

No help directory in database

204

No help information for specified path name