DCL:MISC£±:FIOLIB: File Input/Output #:Explanation of Subroutines
Opens a file.
CALL FCOPEN(IOU,CDSN,NRL,CACT,ICON)
IOU (I) I/O unit number. CDSN (C*(*)) File name. NRL (I) Length of record. CACT (C*1) Specification of I/O mode. Specify 'R' when reading and 'W' when writing. ICON (I) Condition code.